All software

Set of helper NuGet packages for .NET projects, with ASP.NET Core middleware, MVC filters and extension methods.

Offline search theme for Docusaurus v2 and v3 that indexes the docs and blog locally, with no external search service.

Drag and drop library for lists in React, with keyboard and screen reader support, published as @hello-pangea/dnd.

Command-line tool that sets up a local WordPress environment for building and testing plugins and themes, Docker-based by default, published from the Gutenberg monorepo.

Command-line tool with build, lint, format and test scripts for WordPress block and plugin development, published from the Gutenberg monorepo.

Frontend design system of CSS and web components, delivered from a CDN and built on UIkit.

Open-source Linux server management panel with a web interface for websites, databases, containers and an app store.

CSS framework that restyles semantic HTML to look like the Windows 7 interface.

CSS library that restyles semantic HTML to look like the Windows 98 interface.

Minimal, self-hosted web analytics app that stores event counts in MongoDB, PostgreSQL, Redis or SQLite and shows them on a dashboard.

Web framework for building browser-based 3D, AR and VR experiences with HTML and an entity-component architecture.

Script that creates accessible modal dialog windows in a web page, following the ARIA dialog pattern.

Web-based control panel for Linux servers that manages websites, mail servers, FTP, MySQL and Docker from a browser.

Open-source PHP eCommerce platform for running an online store.

Sphinx extension that turns a documentation or personal website project into a blog.

Open-source application framework for building enterprise web applications on .NET and ASP.NET Core, with startup templates, modules and tooling.

GraphQL toolkit for Elixir that implements the GraphQL specification for building HTTP APIs.

Open-source translation management web app that keeps localization files in step with a project through a CLI and a GraphQL API.

Embeddable code editor written in JavaScript for web pages and JavaScript applications.

Library of animated React and Tailwind CSS components, blocks and templates that users copy into their own projects.

Self-hosted web analytics tool built with Node.js and MongoDB, which runs on the operator's own server and reports on the traffic of their websites.

ACME protocol client written in POSIX shell that issues, installs and renews TLS certificates from ACME certificate authorities.

Composer package that loads Laravel components, such as Blade, Eloquent and Artisan, inside WordPress plugins and themes.

Drupal distribution of modules and configuration for building low-code websites on the Acquia platform.

Node.js and TypeScript API server framework for HTTP, WebSocket and other transports, with clustering and background tasks.

Object-relational mapping library for Ruby that maps classes to database tables, distributed as part of Rails.

Java platform of self-contained libraries for web, high-load and cloud applications, covering dependency injection, asynchronous I/O and an HTTP server.

Workflow automation platform with a self-hostable server and an embeddable builder that a SaaS product can place inside its own app.

Rust web framework for building HTTP servers and web applications, with routing, middleware, WebSocket support and an async runtime.

Static site generator written in Rust, configured with TOML files and able to build Markdown feeds.

Web-based database management tool distributed as a single PHP file.

Database management tool written in PHP that is distributed as a single file and built on Adminer.

TypeScript-first Node.js web framework for web apps and API servers, with ORM, validation, mail and queues in the core distribution.

JavaScript data grid library, in a Community edition under the MIT license and an Enterprise edition under a commercial license, for displaying and editing tabular data.

Component library whose source a CLI copies into the project, for React, Vue, Svelte and Lit.

Framework-agnostic component factories with headless and Bootstrap-styled components for Angular, React and Svelte.

PHP e-commerce and shop system, available as a stand-alone Composer install and as a Laravel package.

Asynchronous HTTP client and server library for Python, built on asyncio, with a web server and a client session API.

Dependency-free JavaScript datepicker that attaches a calendar to a text field or to a block or inline element.

JSON Schema and JSON Type Definition validator for Node.js and browsers that compiles schemas into validation functions.

Open source content management engine for Ruby on Rails, usable as a server-rendered or headless CMS.

Database migration tool for Python that runs versioned schema changes through SQLAlchemy.

Express-style web server and REST API framework for Dart, with routing, middleware, body parsing and static file serving.

Git-based headless CMS for Next.js that stores every entry as a JSON file in the project repository.

Class-less CSS stylesheet that styles plain HTML5 semantic tags, with CSS-variable theming.

JavaScript framework that adds reactive behavior to HTML through attributes written in the markup.

Open-source proof-of-work CAPTCHA widget and server verification libraries, with a paid self-hosted server (Sentinel) and a hosted service (Cloud).

TypeScript-based static website generator for hand-coded marketing sites, with localization and Nunjucks templates.

Swift web framework for mocking HTTP API endpoints, built on the SWSGI interface and served by Embassy or another SWSGI server.

Web application framework written in Crystal, with routing, controllers, views and a command-line tool for generating applications.

Pure CSS lighting system that derives element shadows and highlights from one light source.

JavaScript library for interactive charts, maps and stock charts in web pages and web apps.

Java content management system for websites, intranets and portals, published under the Apache License.

Rust library for whitelist-based HTML sanitization.

Open-source UI component library from AWS Amplify, with components that connect directly to the cloud.

Full-stack meta-framework for building Angular applications and websites, with Vite builds and Nitro server integrations.

Full-stack web framework for Rust with database records, views, templates and WebAssembly components.

Full-stack web framework for Go whose command-line tool generates application code, with server-rendered pages and optional Inertia frontends.

Open-source web server forked from nginx, intended as a drop-in replacement for it.

TypeScript-based web application framework with client-side, server-side and prerendered rendering.

Material Design UI components for Angular applications, built by the Angular team.

Headless, accessible UI primitives for Angular that ship without styles.

JavaScript animation library that animates CSS properties, SVG, DOM attributes and JavaScript objects.

Ansible roles that deploy applications with a Capistrano-style workflow, with a companion role for rollback.

Enterprise-class UI design language and React component library.

Enterprise-class UI component library for Blazor, based on Ant Design.

UI component library of essential UI blocks for building mobile web apps.

React page-level components built on Ant Design for tables, forms, layouts and other admin-style screens.

Vue component library based on Ant Design, with a set of enterprise-style UI components.

Open-source desktop SQL client built with Electron and Vue.js for MySQL, MariaDB, PostgreSQL, SQLite and Firebird.

Modular, multi-repository documentation site generator that publishes AsciiDoc content from git repositories.

Web application firewall that sits in front of a web service and makes each visitor solve a proof-of-work challenge before the request reaches the service, to stop scraper bots.

Realtime server, written in Go, that delivers messages to WebSocket and other clients with delivery guarantees and presence tracking.

Django email integration that sends and receives mail through transactional email service providers.

Open-source API gateway for routing, securing and managing traffic to APIs, microservices and LLM providers, built on NGINX and etcd.

Go library for access control that enforces ACL, RBAC and ABAC models defined in a configuration file.

Open source NoSQL distributed database for scalable, highly available clusters on commodity hardware or cloud infrastructure.

Database server with multi-primary replication, an HTTP/JSON API and a built-in web administration console, written in Erlang.

JavaScript library for interactive charts and data visualization that runs in the browser.

Open-source web server for modern operating systems, extended by loadable modules.

Distributed key-value NoSQL database that stores data in RocksDB and accepts Redis clients and Redis cluster SDKs.

Java full-text search library that applications embed to index documents and run searches over them.

C# full-text search library, ported from Apache Lucene, that .NET applications reference to index and search documents.

Java suite of enterprise business applications for ERP, CRM and e-commerce, built on an entity engine, a service engine and a widget-based UI.

Server- and client-side HTTP toolkit for Scala and Java, built on Apache Pekko Actor and Streams.

Java multi-user and group blog server that runs as a web application on a servlet container and a relational database.

Java-native API gateway for HTTP, Dubbo, gRPC and WebSocket services, with plugins for authentication, traffic control and observability.

Java security framework that performs authentication, authorization, cryptography and session management.

Application performance monitoring system for distributed systems, microservices and container-based architectures.

Java framework for RESTful web applications that maps HTTP request URLs to resources in an extensible content tree.

Open source search platform built on Apache Lucene that runs as a Java server process.

TYPO3 extension that connects the TYPO3 CMS to an Apache Solr server for site search.

Apache Struts is an open-source MVC framework for building Java web applications.

Java toolkit that detects and extracts metadata and text from over a thousand different file types, such as PPT, XLS and PDF.

Java servlet and JSP container, an open source implementation of the Jakarta Servlet, Pages, Expression Language, WebSocket, Annotations and Authentication specifications.

Jakarta EE application server built on Apache Tomcat, distributed in Web Profile, MicroProfile, Plus and Plume flavors.

Open-source caching proxy server for HTTP/1.1 and HTTP/2 traffic, used for forward and reverse proxying.

Component-based Java web framework that keeps behavior in Java classes and markup in plain HTML.

Single sign-on and identity provider server written in Java, supporting the CAS, SAML, OpenID Connect and OAuth 2.0 protocols.

JavaScript charting library that draws interactive charts with SVG for websites and web apps.

PHP framework for building REST and GraphQL web APIs, with a core library and integrations for Symfony and Laravel.

PHP framework built on Laravel for creating API-centric applications, organized with the Porto architecture pattern.

Python web API framework built on Flask, with marshmallow or Pydantic schemas and automatic OpenAPI documentation.

Pluggable API specification generator for Python that currently supports the OpenAPI Specification.

Open-source backend platform that generates GraphQL and REST APIs from a schema kept in the project, with a Console for reviewing and publishing changes and a managed cloud.

Full-stack PHP framework made of independent libraries, installed with Composer as a project skeleton.

GraphQL client library for JavaScript that fetches, caches and modifies remote and local application data.

Open-source GraphQL server for Node.js that runs as an add-on to new or existing Node.js apps, including Express, Fastify and AWS Lambda.

Node.js content management system with in-context editing on the live page, which can also serve content through a REST API for headless use.

Notification library and command line tool that sends one message to many notification services through a common URL format.

Open source low-code platform for building internal tools, admin panels and dashboards.

Open-source backend platform with authentication, databases, storage, functions and messaging, available as Appwrite Cloud or self-hosted with Docker.

Open-source, privacy-first analytics platform for mobile, desktop and web apps, with SDKs that send events to a self-hosted or managed server.

Multi-model database for documents, graphs and key-value data, queried with the AQL query language.

React UI components library based on the Arco Design system.

Vue UI component library, based on the Arco Design system, distributed as an npm package.

Python library for implementing GraphQL servers with a schema-first approach.

Open-source React library of unstyled, accessible UI primitives and components for building web apps and design systems.

Static site generator written in Bash that builds Markdown pages with pandoc for deployment from a Git repository to a cloud static host.

Headless, unstyled and accessible UI components for React, Solid, Vue and Svelte.

TypeScript runtime validation library that parses validators from type-safe string and object syntax.

Tiny reactive UI runtime built on JavaScript modules, template literals and the DOM.

Self-hosted comment system that is embedded into a blog, website or web application.

Command-line load testing tool that runs scripted HTTP, WebSocket, Socket.IO and Playwright tests.

Ruby text processor that converts AsciiDoc source into HTML 5, DocBook 5, man pages and other output formats.

Command-line version manager for language runtimes and developer tools, configured per project in a .tool-versions file.

Declarative, extensible framework for building Elixir applications around resources and actions.

Rust template engine based on Jinja that generates type-safe Rust code from templates at compile time.

Cross-platform, open-source framework for building web apps and services with .NET and C#.

ASP.NET Core library that generates static HTML files from the routes of an ASP.NET Core app.

Java library of fluent, strongly typed assertions for unit tests, usable with JUnit, TestNG and other frameworks.

Open-source TypeScript and React library of components for building AI chat interfaces.

Web framework for content-driven websites that prerenders pages to static HTML and can render routes on demand.

Visual Studio Code extension that adds language support for .astro files, powered by the Astro language server.

Open source React design system built on StyleX, with themes and a command-line tool.

GraphQL server library for Rust that defines schemas with procedural macros and runs on async/await.

Web UI for monitoring and administering Asynq task queues, run as a binary or imported as a library into a Go web application.

PHP static site generator for GitHub Pages that builds Markdown pages and posts with a GitHub Action.

Crystal web framework built from reusable, independent components.

Design system of Atlassian, with the Atlaskit npm packages that implement it.

Self-hostable server for storage, search, sharing and sync of Atomic Data, with a web app and a RESTful API.

Micro-library for building web components with functions and hooks.

Go micro web framework built on fasthttp.

JavaScript library that adds touch-friendly 3D parallax hover effects to elements on a page.

Aurelia 2 is a front-end JavaScript framework for building browser, mobile and desktop applications.

Design system of Alaska Airlines, built as web components, with one repository per component.

Authentication library for JavaScript web frameworks, with OAuth and OpenID Connect providers, email sign-in and credentials.

Open-source authentication and authorization server and portal that adds multi-factor authentication and single sign-on in front of web applications.

Self-hosted, open source identity provider with OIDC, SAML, LDAP and proxy authentication.

Open-source login and identity service with passkeys, SSO, MFA and user management, self-hosted or offered as Authgear Cloud.

Python library for building OAuth and OpenID Connect clients, authorization servers and protected APIs.

Zero-config, drop-in animation utility that adds transitions to a web app when elements are added, removed or moved.

Open-source JavaScript library, published by Algolia, for building autocomplete experiences.

Flat-file content management system and template engine, written in PHP, that stores content in text files without a database.

Open-source workflow automation app that connects third-party services in flows, offered as a cloud solution or self-hosted.

Library of data structures for building collaborative applications, with a JavaScript package and a Rust core.

Standalone JavaScript library that provides live as-you-type formatting for international numbers and currencies.

PostCSS plugin that parses CSS and adds vendor prefixes to rules, using browser support data from Can I Use.

Test runner for Node.js with a concise API, detailed error output and concurrent test runs.

Admin panel framework and content management system for Ruby on Rails.

Open-source headless e-commerce system with a GraphQL API on a Laravel backend and a separate frontend application.

Ultra lightweight autocomplete widget for input fields, with zero dependencies.

Ruby framework that builds static HTML sites from AsciiDoc, Markdown or Textile sources, YAML data and templates.

JavaScript accessibility testing engine that checks websites and other HTML-based user interfaces inside automated tests.

Promise-based HTTP client for the browser and Node.js.

Rust HTTP routing and request-handling library focused on ergonomics and modularity.

Open-source PHP web platform for websites that serve game server communities, extended with add-ons.

JavaScript compiler that rewrites next-generation JavaScript into code that runs in the browsers and runtimes a project targets.

Open-source JavaScript and TypeScript 3D rendering engine for the web.

JavaScript library that gives web applications models, collections, views and events over a RESTful JSON interface.

Content management system written in PHP, forked from Drupal.

Laravel package that builds admin panels with CRUD pages, installed with Composer.

Visual regression testing tool that captures screenshots of a web app over time and compares them against approved references.

Laravel-based API and admin platform with a Vue dashboard, a CRUD generator and REST and GraphQL APIs.

Static site generator in which each site is a Janet program that declares its data and its output files.

Open-source Laravel eCommerce platform with a multi-vendor marketplace option.

Lightbox script for image galleries, written in pure JavaScript.

Small classless CSS framework that styles semantic HTML without framework classes.

Trendyol's design system, implemented as native web components.

Python blogging engine and static website generator that writes posts in Markdown.

Modular Material Design UI library for Vue 3.

HTTP server written in Elixir for Plug and WebSock applications, including Phoenix.

Text processor and static website generator that fills keyword placeholders in text files from a Bang markup file.

JavaScript library for smooth transitions between the pages of a website, which makes the site behave like a single-page application.

Go framework for building JSON-based web APIs.

Unstyled React component library for building accessible user interfaces.

React component library that implements Base, a design system, for web apps.

Component library built with Tailwind CSS that works with any web stack.

Open-source PHP content management system built on CakePHP for building and customizing websites, with a REST API.

No-code platform for building databases, applications and automations, available as a hosted cloud or self-hosted.

Blog generator delivered as a single Bash script that writes static HTML pages for posts, tags and an RSS feed.

Single bash script that builds a blog from Markdown files in a directory.

PHP static site generator that makes YAML frontmatter queryable through SQLite from Twig templates.

E-commerce package for Laravel applications, installed as a drop-in layer next to the rest of the application.

Content management system for Phoenix LiveView applications, with an admin UI package and sites defined in a database.

Content management system built with Phoenix LiveView.

Asynchronous Python object-document mapper (ODM) for MongoDB.

General-purpose work queue server that one process fills with jobs and other processes take them from.

Static site generator that converts a folder of Markdown files into HTML pages, written in Go.

Build plugin that inlines a page's critical CSS and lazy-loads the rest of its stylesheets.

Jekyll theme for personal websites, blogs and project websites, set up by forking a repository on GitHub or by adding a Ruby gem.

PHP library of assertions and guard methods for input validation.

Project boilerplate that installs WordPress with Composer and a git-friendly directory layout and environment-based configuration.

Desktop SQL client for MySQL, PostgreSQL, SQLite, SQL Server and other databases.

CSS framework based on Material Design 3 that styles semantic HTML elements.

BDD framework for PHP that tests business expectations.

Behavior-driven development framework for Python that runs tests written in natural language.

Python static site generator for documentation, blogs and other Markdown-based sites, with a built-in dev server.

Static site generator written in Python and Jinja2 that builds websites and blogs from Markdown files.

Framework-agnostic authentication and authorization framework for TypeScript.

Open-source web analytics platform with session replay, error tracking, Core Web Vitals and uptime monitoring, offered as a managed cloud service or self-hosted with Docker.

Full-stack web framework for Clojure with SQLite, Datastar, email sign-in and an admin dashboard, composed from separate libraries.

JavaScript chart library that renders charts as SVG or Canvas, built on D3.

Scala data-binding library for the JVM and Scala.js, with expressions that recalculate when their dependencies change.

PHP MVC framework for building web applications, published by Tencent on GitHub.

Toolchain for web projects with a formatter and a linter, usable from the command line and through a language server.

Open source build toolchain that organizes source code into composable components, with a component workshop and a hosted cloud for sharing them.

Self-hosted, open-source cryptocurrency payment processor that sends payments to the merchant's own wallet, with a Merchants API, an admin panel and a checkout script for websites.

Headless, unstyled Svelte component primitives for building accessible component libraries.

Asynchronous ASGI web framework for Python, with routing, dependency injection, templating and an HTTP client.

Blog-aware static site generator written in Python that builds a site from Markdown content and Jinja2 templates.

Framework-free open source UI toolkit of CSS and web components.

Web UI framework for building interactive web apps with C# and Razor components, shipped as part of ASP.NET Core.

Component library for Blazor with styled components and headless primitives, inspired by shadcn/ui.

Component library for Blazor that renders its components with a choice of CSS frameworks.

Static site generator that turns a Blazor app into a folder of static HTML files, with pages and Markdown posts built by .NET.

Go library for indexing and searching text, numeric, geo-spatial and vector data, with a command-line tool.

Fullstack toolkit that adds conventions, Blitz RPC and authentication libraries on top of Next.js.

Block-based rich text editor for React applications.

Toolkit for building editors and collaborative applications, with a headless framework and prebuilt editor components.

R package that builds blogs and websites from R Markdown files, using the Hugo static site generator by default.

Nuxt layer that turns Markdown files into a blog, with themes, SEO modules and integrations preconfigured.

Command-line static site generator written in Rust for blogs and personal websites, with a built-in terminal editor and GitHub Pages deployment.

Java content management system with authoring tools, a headless delivery tier and a Maven project archetype, published under the Apache License 2.0 as the community edition of Bloomreach Experience Ma

Java enterprise CMS from Bloomreach, offered as Bloomreach Cloud and as on-premise deployments, with an Apache-2.0 community edition of its open source releases.

Flat-file CMS that stores content in JSON files and needs only a web server with PHP.

HTML sanitizer for Go that removes markup outside an allowlist from untrusted input, such as user generated content.

React UI toolkit of components and styles for data-dense web interfaces, developed at Palantir.

Collection of Web Components, themes and layout utilities for building user interfaces that work across frameworks.

Python static site generator that builds Schema.org-annotated Markdown content and Jinja templates into a site focused on SEO and page speed.

Fake data generator for the .NET languages C#, F# and VB.NET that fills objects with locale-aware values for tests and seeded databases.

Python library for interactive plots and data applications that render in web browsers.

Open-source PHP content management system built on Symfony, usable as a traditional or headless CMS.

R package for writing books and long-form documents in R Markdown, rendered to HTML, PDF, LaTeX, EPUB and Word.

Command-line toolchain that builds books, static websites, feeds and EPUB files from Markdown, written in C#.

Java platform for building runnable Java applications without a container, such as REST services, web apps and jobs.

HTML, CSS and JavaScript toolkit for developing responsive, mobile-first projects on the web.

Compiler and stylesheet that turns HTML written with Bootstrap-like classes into table-based markup for HTML emails.

Open source SVG icon library, with an icon font, a sprite and Sass source, published for Bootstrap and usable in any project.

Datepicker widget in the Bootstrap style, called as a jQuery plugin.

Component library for Blazor applications built on Bootstrap, distributed as a NuGet package.

Vue 3 component library that implements Bootstrap 5 components with TypeScript types and WAI-ARIA markup.

Free themes for Bootstrap, each one a replacement CSS file with SCSS variables for customization.

Python micro web framework distributed as a single file module with no dependencies beyond the standard library.

PHP library for managing roles, abilities and model ownership on Eloquent models, integrated with Laravel's gate.

Headless ecommerce platform with an admin panel and API, offered as a hosted service and as open-source Docker images for self-hosting.

Icon library of SVG and icon-font packs, with npm packages for JavaScript and framework components.

Themeable React design system and component library that SEEK publishes as the npm package braid-design-system.

Ruby site generator and fullstack framework that builds static sites and, through Roda, serves server-rendered routes.

Web framework for JSX pages and web components that runs a Bun server by default and can also produce static output.

Java and Spring e-commerce framework for building commerce-driven websites.

Bundler that lets browser code use Node.js-style require() calls to load npm modules into a single script.

Docker image that runs headless browsers as a service, which Puppeteer and Playwright scripts connect to over WebSocket.

PHP library that renders a web page to an image or PDF through headless Chrome driven by Puppeteer.

Node development server that keeps multiple browsers and devices in sync, reloading pages and mirroring interactions as files change.

Static site generator written in Bash that builds a website from Markdown posts and pages.

Self-hosted, open-source cryptocurrency payment processor that sends payments directly to the merchant's own wallet.

Open-source low-code platform for building internal tools, automations and AI agents, self-hosted or as Budibase Cloud.

Vue.js component library of responsive UI components built on the Bulma CSS framework.

Go web development framework and toolkit that generates and runs web applications with routing, a database layer and templates.

Debugging server that receives exceptions, variable dumps, emails, profiles and logs from application SDKs and shows them in one real-time web UI.

Self-hosted error tracking server that accepts events from Sentry SDKs, with an optional managed version run by the same company.

Error monitoring and performance monitoring service for mobile, web, desktop and server applications, offered as a hosted platform and as an on-premises installation.

Dashboard UI for Bull and BullMQ job queues, mounted into an existing Node server or run as a standalone CLI or Docker image.

CSS framework based on Flexbox that provides ready-to-use components.

Fast all-in-one JavaScript and TypeScript runtime that also ships a package manager, test runner and bundler as one executable.

SQL-first object-relational mapper for Go that builds queries on database/sql.

Testing library for Blazor components that renders them inside .NET unit test projects and verifies their markup.

Open-source web application firewall that runs as a reverse proxy in front of web services, with an optional web UI.

Database governance platform with a web console for schema change management, SQL review and database access control.

ByteMD is a Markdown editor component built with Svelte.

Content management system built on the Microsoft .NET stack, distributed as open source.

Open-source consent manager that renders cookie banners, a preferences dialog and consent-gated scripts for JavaScript frameworks.

c8 is a code-coverage tool for Node.js that uses the built-in V8 coverage and outputs Istanbul-compatible reports.

Web server written in Go that obtains and renews TLS certificates automatically, configured with a Caddyfile or a JSON API.

Open-source workflow engine for building fault-tolerant, stateful distributed applications.

PHP MVC web framework with an ORM, code generation and convention-based configuration.

Esri's framework-agnostic web component library and design system for building web applications.

Content management system for Ruby on Rails, distributed as a gem and run inside a Rails application.

CanCanCan is an authorization library for Ruby and Ruby on Rails which restricts what resources a given user is allowed to access.

Java image server that generates cropped, scaled, rotated and watermarked derivatives of source images on request, including IIIF Image API responses.

Publishing platform package for Laravel applications, with an admin interface for writing posts and an optional starter blog reader.

JavaScript library that draws confetti animations on an HTML canvas.

Rich text editor that draws its document on an HTML canvas, with an optional SVG backend.

Self-hosted CAPTCHA alternative that verifies visitors with proof-of-work and instrumentation challenges instead of puzzles.

Remote server automation and deployment tool written in Ruby that runs deployment tasks over SSH from the developer's command line.

Static site generator for React and Preact that renders pages to static HTML and hydrates only the components marked as islands.

PHP static site generator that builds pages from Blade views, with collections and Markdown support.

Self-hosted platform as a service that deploys apps and one-click services to Docker containers behind nginx with automatic HTTPS.

Ruby library that simulates a user's interactions with a web application in acceptance tests.

PHP library that extends DateTime with an API for creating, changing and formatting dates.

Chart component library for vanilla JavaScript, with bindings for Svelte, React, Vue.js and Angular.

Svelte component library implementing IBM's open source Carbon Design System.

Open-source design system built by IBM, with React and Web Components packages.

Document generator that fills Word, Excel, OpenDocument and PowerPoint templates with JSON data and exports PDF and other formats.

Framework that adds a thin layer of extension methods and routing over ASP.NET Core for building web applications and HTTP APIs.

Open-source identity and access management and single sign-on platform with a web admin console.

Small jQuery-style library for DOM manipulation in modern browsers.

Scala web micro-framework for setting up websites, backend servers and REST APIs.

JavaScript authorization library that defines what a given user may access, for browsers and Node.js.

PHP command-line static site generator that builds websites from Markdown pages and Twig templates.

Shell menu based installer for an Nginx LEMP stack on AlmaLinux and Rocky Linux servers.

JavaScript client SDK that connects a browser, Node.js or React Native app to a Centrifugo or Centrifuge server over WebSocket or HTTP-based transports.

Self-hosted real-time messaging server that delivers published messages to browser and app clients over WebSocket and other transports.

Open-source distributed storage system that serves object, block and file interfaces from one cluster built on commodity hardware.

Python library for validating data against a schema of rules, with type checking and custom validators.

Open-core authorization engine that evaluates access policies for applications and services over HTTP and gRPC.

Kubernetes controller that issues and renews X.509 TLS certificates for workloads in a Kubernetes or OpenShift cluster.

Command-line client that obtains and renews TLS certificates from Let's Encrypt and other ACME certificate authorities.

Go library that obtains and renews TLS certificates from ACME certificate authorities for Go programs.

JavaScript library for building 3D globes and 2D maps in a web browser, rendered with WebGL.

Assertion library for Node.js and the browser that pairs with any JavaScript test framework.

Open-source AI-enabled visual website builder for Next.js, with a block-based editor and server-side data providers.

Accessible React component system for building web apps and design systems.

Django extension that adds WebSocket, long-poll HTTP and other asynchronous protocol handling to Django projects.

JavaScript charting library that draws charts on an HTML5 canvas.

JavaScript chart library that plots sketchy, cartoony or hand-drawn styled charts inside an SVG element.

Web-based editor that visualizes and designs database schemas as diagrams and exports DDL scripts.

JavaScript library that draws responsive charts as SVG, styled with CSS.

Ruby gem that renders JavaScript charts from one line of Ruby in a view.

CSS framework that styles HTML tables as data charts.

Vagrant-based local virtual server, installed from a Git repository, that runs a WordPress site with PHP, nginx and MySQL on the developer's machine.

Pythonic, object-oriented HTTP framework with a built-in WSGI web server.

Object document mapper for Elasticsearch in Ruby, built on the official elasticsearch-ruby client, with ActiveRecord integration.

Router for building Go HTTP services.

Vanilla JavaScript select box and text input plugin with configurable options and no jQuery dependency.

CSS framework that styles plain HTML elements and includes a grid and a few components.

Syntax highlighter library in pure Go that converts source code and other structured text into highlighted HTML or ANSI-colored text.

Go package that drives browsers which speak the Chrome DevTools Protocol, without an external driver.

PSR-15 middleware microframework for PHP, built on PSR-7 and PSR-17 HTTP interfaces.

Blogging engine written in PHP for hosting a blog on your own web server, with Feathers for post types and Pages for standalone articles.

React component library and design system for SumUp's web products.

SCSS framework with pre-built components and utility classes.

JavaScript rich-text editor framework written in TypeScript, built from modular packages and published by CKSource.

Angular component library of the Clarity design system, which takes its styles from the @clr/ui package.

Validation library for TypeScript and JavaScript classes that checks object properties against rules declared with decorators.

Content management system forked from WordPress, without the block editor.

Static site generator in Ruby, aimed at math-heavy sites, that builds pages from claytext source files.

CSS optimizer that minifies and rewrites stylesheets for Node.js and for use in a browser.

Column-oriented SQL database management system for analytical queries, available as open-source server software and as a cloud service.

Web-based database manager that a team uses from a browser, served by a Java application with a TypeScript and React interface.

Command-line tunneling daemon that connects a web server or other origin to the Cloudflare network without opening inbound firewall ports.

Server control panel for configuring and managing virtual machines that run PHP, Node.js, Python and static websites.

Open source design system of guidelines, React components and design resources for building web applications.

JavaScript plugin that shows a large list or table in a scrolling container by keeping only the rows near the scroll position in the page.

C library and command-line program that parses CommonMark Markdown into a syntax tree and renders it as HTML, man, LaTeX, CommonMark or XML.

Open-source content management system built in PHP, with the Smarty templating engine.

Flat-file content management system that stores its data in files and needs no database.

Full-stack framework that generates ASP.NET Core APIs and Vue.js front-end code from Entity Framework Core models.

Straightforward static site generator written in Rust that turns Markdown pages, posts and Liquid layouts into a static site.

Self-hosted headless content management system with a REST and GraphQL API and an administration panel.

Distributed SQL database that runs as a cluster of nodes and keeps its data replicated across them.

Full-stack web framework under ASP.NET Core with MVC, model-view, controller-view and view-only page structures.

Full-stack testing framework for PHP that writes acceptance, functional and unit tests in a BDD-inspired style.

End-to-end testing framework that writes tests as user actions and runs them through Playwright, WebDriver, Puppeteer or Appium.

PHP MVC web framework with a small footprint and few configuration requirements.

Code editor component for the web with syntax highlighting, search and extension APIs, built as a set of npm packages.

Open source ASP.NET Core content management system and application framework with code-first development.

Client-side CMS that edits the Markdown and other files of a GitHub repository in the browser.

Conventions-based HMVC web framework for BoxLang and CFML applications, with dependency injection, caching, logging and REST routing.

Blog generator written in Common Lisp that builds a static website from post files kept in a git repository.

Open source online editor for text documents, spreadsheets and presentations, embedded into other applications over WOPI.

Self-hosted web comment engine that adds threaded comments, voting and moderation to web pages through an embedded widget.

PHP framework for building REST APIs, CRUDs, admin panels and microservices, served by its own HTTP server.

Rails engine that adds an embeddable, self-hosted content management system with editor-managed pages and layouts to an existing Rails application.

Java library that parses CommonMark Markdown into a syntax tree and renders it to HTML or Markdown.

JavaScript parser and renderer for CommonMark that turns Markdown into a syntax tree and renders it to HTML or XML.

Ruby gem that wraps the comrak Rust parser to convert CommonMark and GitHub Flavored Markdown to HTML.

Open source Node.js server that handles OAuth and streams files from remote sources such as Google Drive and Dropbox into uploads made with Uppy.

Compile-time CSS-in-JS library for React that writes its styles out as atomic CSS.

Documentation tool that generates static documentation from the source of Angular applications and libraries.

Routing library for Ring that composes Clojure web applications from small, independent route definitions.

Library on top of Compojure for building web APIs with data coercion and Swagger API documentation.

Content management system with forums, member blogs, a wiki and content features, built in PHP for building most kinds of website.

CommonMark and GitHub Flavored Markdown compatible parser and renderer written in Rust.

Open-source content management system for teams, written in PHP, with a built-in REST API and a MySQL or MariaDB database.

Classless CSS stylesheet that styles plain HTML elements without class names, with a dark theme.

Open source workflow engine that persists durable workflows for microservices and AI agents, with workers written in several languages.

Self-hosted modular backend-as-a-service with modules for authentication, database, storage, chat and communications.

Go web application framework for building API servers with routing, middleware and validation.

Type-safe form validation library that progressively enhances HTML forms, with React bindings and support for Remix and Next.js.

TypeScript implementation of Connect, a family of libraries for building type-safe APIs from Protocol Buffers schemas.

Python framework that builds an API from an OpenAPI or Swagger specification and validates requests and responses against it.

Zero-dependency JavaScript cookie banner that a site configures with a JSON object and that passes the visitor's consent state to callbacks.

Open-source PHP content management system built on the Symfony framework.

Open-source platform for building data-driven web applications, with a GraphQL API, PostgreSQL and a React administration interface.

Modular content management system built on the ColdBox framework that runs on ColdFusion/CFML engines and Java servlet containers.

Git-backed content management platform, self-hostable as an AGPL core, that stores structured content in a repository and edits it through chat, forms or a web UI.

Linux control panel for managing web hosting, websites and servers on dedicated servers and VPS, with a free core and a paid CWPpro edition.

Open-source reactive database and backend for web apps, with server functions written in TypeScript and a cloud platform run by the maker.

Webhooks gateway that ingests, stores, retries and delivers webhook events, run as a self-hosted server and agent or as a hosted cloud service.

Vanilla JavaScript consent management library that shows a cookie banner and blocks scripts until visitors consent.

Vanilla JavaScript library that shows a GDPR cookie consent banner and stores the visitor's accept or reject choice in a cookie.

Open-source, self-hostable platform that deploys applications, databases and services to Docker containers on the user's own servers.

Open-source commenting platform that a website embeds to host comments, moderation and community tools.

Web component framework that builds static sites, dynamic websites and single-page applications from HTML modules.

Web application firewall library written in Go that runs ModSecurity SecLang rule sets, including the OWASP Core Rule Set, inside web servers and proxies.

Proprietary enterprise content management system and digital experience platform, offered as a hybrid headless CMS.

Open source UI components library that extends Bootstrap, with a paid PRO edition.

Open-source observability and application performance tool that collects metrics, logs, traces and profiles with eBPF and OpenTelemetry, with root cause analysis.

Unstyled, accessible and customizable UI primitives for SolidJS.

Rust web framework for building web applications, with an ORM, forms, an admin panel, templates and a command line tool.

Distributed JSON document database with key-value access, a SQL-like query engine and a built-in web console, made by Couchbase, Inc.

Open-source CMS that lets web designers make existing HTML and CSS templates editable without writing PHP.

Privacy-friendly web analytics that counts daily unique visitors and referrers for a website, served by a Go server backed by Redis.

Self-hosted analytics and engagement server that collects data from web, mobile and desktop applications and shows it in dashboards.

JavaScript class that animates a numerical value by counting to it.

PHP tool that generates a documentation website from Markdown files and publishes it on GitHub Pages.

Code coverage measurement tool for Python programs.

HTTP server for Erlang/OTP that provides routing, handlers, WebSocket, HTTP/2 and REST support.

Proprietary web hosting control panel and server management software, sold as cPanel & WHM licenses for servers that host websites.

C++ web development framework for building web applications and web services, served by its own HTTP, FastCGI or SCGI front end.

Database-backed PHP content management system with a control panel, Twig templating and a GraphQL API.

E-commerce plugin that adds stores, products and orders to a Craft CMS site.

React framework for building drag-and-drop page editors from the developer's own React components.

Content management platform for building digital experience applications, with a Java server and an authoring studio.

JavaScript and TypeScript UI framework whose components are plain functions, generators and promises.

Library of web components that follows the Freshworks Design System, published by Freshworks.

Interactive command-line tool that scaffolds a full-stack, typesafe Next.js app with optional libraries.

Node.js module and CLI that extracts the above-the-fold CSS from HTML pages, inlines it and defers the rest of the stylesheets.

Headless TypeScript CMS for React and Next.js websites, with a GraphQL API, an admin panel and a theme editor.

Multi-server task scheduler and runner with a web UI, written in Node.js, that runs scheduled, repeating and on-demand jobs on worker servers.

JavaScript image cropper, built as a series of web components.

C++ microframework for building HTTP and WebSocket web services, with routing, JSON, templates and middleware.

Open-source security engine that detects malicious behavior from logs and HTTP requests and blocks it through bouncers for web servers, reverse proxies and firewalls.

Commercial eCommerce software for building online stores and multi-vendor marketplaces, run on the customer's own server.

Software development framework for .NET that provides business objects, a rules engine and data binding for the business layer of an application.

Icon library of CSS, SVG and Figma icons.

Ruby gem that installs a Node-based CSS bundler (Tailwind CSS, Bootstrap, Bulma, PostCSS or Dart Sass) into a Rails application and delivers its output through the asset pipeline.

Modular CSS minifier, built on the PostCSS ecosystem, that compresses stylesheets with a set of optimizations and presets.

Ruby microframework for web development.

Self-hosted ecommerce platform written in PHP for running an online store on the merchant's own server.

Python web framework for data-centric applications built on an explicit schema, with a query language and components called cubes.

Java implementation of Cucumber, a tool for running automated tests written in plain language.

Ruby implementation of Cucumber, a tool for running automated tests written in plain language.

JavaScript implementation of Cucumber, a tool for running automated tests written in plain language.

Pure Ruby driver for Capybara that runs Capybara tests on headless Chrome or Chromium.

Command line tool and library for writing, previewing, exporting and publishing scientific and technical documents in MyST Markdown.

React static site generator that builds HTML pages from Markdown and YAML content using React layouts.

A TypeScript library for building type-safe, variant-driven class names with Tailwind CSS or any other styling approach.

Web hosting control panel for managing websites, email, DNS and databases on a Linux server, built on OpenLiteSpeed.

PHP DataMapper ORM and data modelling engine for classic and daemonized PHP applications.

End-to-end and component testing framework that runs tests in a real browser.

JavaScript graph theory library for visualizing and analyzing networks in browsers or on Node.js.

JavaScript library for bespoke data visualization that runs in the browser.

Web analytics pipeline that receives GA4 and Matomo tracking and writes sessions to BigQuery, ClickHouse or CSV and Parquet files.

Self-hostable workflow engine that runs declarative YAML workflows of scripts, commands and containers on one machine or a fleet of workers, with a built-in web UI.

Component library for Tailwind CSS that adds named component classes and themes.

Lightweight web application framework written in Perl, built on Moo and running on PSGI.

HTTP, HTTP/2 and WebSocket protocol server for ASGI applications, developed to power Django Channels.

Object mapper library for .NET that runs SQL through ADO.NET database connections and maps the results to typed objects.

Self-hosted application server that runs APIs, identity, permissions, files and automation from a schema of data.

Single-binary static web server written in C, run with a web root and no configuration file.

Minimalistic backend framework for Dart that builds routes and middleware on shelf and compiles production builds to a Docker image.

Python framework for building data apps and dashboards, built on Flask, React and Plotly.js.

JavaScript utility that batches and caches data loads from databases and web services within an application's data fetching layer.

Open source Python tool for exploring data held in SQLite and publishing it as an interactive website and JSON API.

A hypermedia framework that lets the backend drive a web frontend through HTML data attributes.

Dependency-free JavaScript library that adds sorting, paging and filtering to HTML tables.

JavaScript library of functions for manipulating dates in browsers and on Node.js.

Flat-file website system in PHP that edits pages in a browser, stores content as files and generates static websites.

Documentation generator that builds websites from a folder of Markdown files.

JavaScript library that parses, validates, manipulates and displays dates and times, with a largely Moment.js-compatible API.

Desktop database management tool and SQL client for many SQL and NoSQL databases, with a free community edition.

Cross-platform database client for SQL and NoSQL databases, available as a desktop app and as a self-hosted web app.

Command-line tool that runs Docker-based local development environments for PHP and Node.js web projects.

Git-based content management interface, delivered as a single-page admin app, that edits the content files of a static site.

GPU-powered framework for visual exploratory data analysis of large datasets, rendered with WebGL2 and WebGPU.

TypeScript framework that builds validation, serialization, HTTP, RPC, database access and dependency injection on TypeScript types kept at runtime.

Command-line ACME client, written as a bash script, that obtains and renews TLS certificates from ACME certificate authorities such as Let's Encrypt and ZeroSSL.

PHP deployment tool that runs deploy tasks on servers over SSH, with recipes for popular PHP frameworks and CMSs.

MVC framework for realtime, collaborative web applications that run in Node.js and in browsers.

Nix-based tool that declares a developer environment in a devenv.nix file (packages, languages, services, processes and tasks) and activates it in the shell.

A suite of JavaScript UI components for Angular, React, Vue and jQuery, sold under a commercial subscription.

Docker-based local development environment for PHP projects, with web servers, PHP versions, databases and development tools as containers.

Authentication solution for Rails based on Warden, with modules for sign-in, registration, confirmation, password recovery and account locking.

Angular UI component library based on the DevUI Design system.

OpenID Connect identity service that sits in front of LDAP, SAML and social login providers, so applications only speak OpenID Connect.

Wrapper library for IndexedDB, the standard database in the browser, for offline-first web applications.

JavaScript Gantt chart component for project scheduling, timelines and task dependencies.

A set of accessible React components, distributed as copy-paste source through the shadcn/ui CLI.

Safe, extensible ORM and query builder for Rust.

Rust framework for building fullstack web, desktop and mobile apps from one codebase.

Proprietary web hosting control panel for managing websites, email, DNS and databases on Linux servers, with a paid license per server.

Backend that wraps an SQL database with REST and GraphQL APIs and a no-code admin app, used as a headless CMS.

Micro-routing library for PHP that maps HTTP requests to handler functions.

R package that provides the Distill format for R Markdown, for articles, blogs and websites built from R Markdown sources.

Python web framework with an ORM, URL routing, templating, forms and an automatic admin interface.

Content management system built on the Django framework, with a page tree, an editing toolbar and multilingual pages.

Django app that combines, minifies and caches linked and inline JavaScript and CSS from Django templates into static files.

UI component framework for Django that builds reusable components from single template files.

Django package that indexes Django models into Elasticsearch through elasticsearch-dsl-py, with signal-based sync and management commands.

Web framework for building APIs with Django and Python type hints, with OpenAPI documentation generated from the code.

Django app that turns a Django project into an OAuth 2.0 authorization server with endpoints, models and token logic.

Toolkit for building Web APIs on Django, with serialization, views, authentication and permissions.

Integrated set of Django applications for local and social account authentication, registration and account management.

Django helpers that bake a database-backed site out as flat static files.

A UI framework for Django that builds reusable template components.

Django app that renders forms as configurable HTML from a template filter, a template tag and Python layout objects.

Static site generator and publisher for Django that renders URLs to HTML files.

Extra authentication backend for Django that grants and checks permissions on individual model objects.

Django app that translates the fields of existing models into several languages through a registration step, without changing the model classes.

Django package that adds translated fields to models, stored in a separate table.

Django module that builds a browsable UI pattern library from Django templates, with YAML data and Markdown documentation per pattern.

Django application for translating a project's gettext catalogs in the browser.

Django template integration that loads Vite development server assets in dev mode and built Vite manifest assets in production.

Package of template tags and filters that change form field HTML attributes and CSS classes from Django templates.

Light markup syntax derived from CommonMark, with implementations in several languages.

Drag and drop toolkit for the web, with a framework-agnostic core and adapters for React, Vue, Svelte and Solid.

Open-source content management system for the Microsoft .NET stack, running on Windows, IIS and SQL Server.

Expert system that runs guided interviews written in YAML and Markdown with Python logic, and assembles documents from the answers.

Rust document search engine that compiles a full-text index into a WebAssembly module for search in the browser.

Documentation site generator for markdown pages, .NET API reference and REST API reference.

Desktop application that installs the Docker Engine, Docker CLI and Docker Compose on macOS, Windows and Linux for building and running containers.

Docker Compose stack of container images for running a local Drupal development environment on Linux, macOS and Windows.

Command-line tool and Docker Compose stacks that set up local web development environments on macOS, Windows and Linux.

Documentation compiler that turns one folder of Markdown into a static documentation website, search index and AI context files.

Free search program from Algolia that crawls documentation into an Algolia index and provides a search box for it through open source frontend packages.

JavaScript library that loads and renders Markdown files as a documentation website in the browser, with no build step.

Hugo theme for building technical documentation sites.

PHP database abstraction layer with an object-oriented API for queries and for schema introspection and management.

PHP library for versioning a database schema and deploying changes to it.

PHP object document mapper that maps PHP objects to MongoDB documents.

PHP object-relational mapper that provides transparent persistence for PHP objects.

Command-line generator that builds API documentation from PHP source code and its phpdoc comments.

Document signing application that sends PDFs for electronic signature, self-hosted under AGPL-3.0 or run as a cloud service.

Documentation generator for Julia that builds a site from Markdown files and the docstrings of Julia packages.

Nuxt theme and CLI that builds documentation sites from Markdown files.

React-based static site generator for documentation websites and blogs written in Markdown and MDX.

Document signing platform that turns PDFs into fillable forms, collects signatures online, and can be self-hosted.

API documentation engine for Kotlin that also documents Java sources, producing HTML, Javadoc and Markdown output.

Self-hosted platform as a service that runs on a single Linux server and deploys web apps pushed to it with git.

PHP library that converts HTML and CSS to PDF documents.

DOM-based XSS sanitizer that cleans HTML, MathML and SVG markup in the browser or on Node.js.

OAuth 2 provider gem that adds authorization server functionality to Ruby on Rails and Grape applications.

Go framework for building stateful, reactive web applications whose interface state is driven from the server.

Open-source toolkit for building headless content management systems in TypeScript, on PostgreSQL or SQLite.

Open-source PHP engine for publishing blogs, with several blogs and users in one installation.

Java content management system with an admin console, REST and GraphQL APIs and multi-site management, distributed as a Docker image and as a managed cloud service.

JavaScript and TypeScript player for Lottie and dotLottie animations, built on a Rust and WebAssembly core.

Open-source MVVM framework for ASP.NET that builds web apps from C# view models and HTML markup.

Documentation generator that builds reference documentation from annotated source code in C++, C, Python, PHP and other languages.

Embeddable, replicated SQL database library in C that extends SQLite across a cluster of machines using Raft consensus.

In-memory data store compatible with the Redis and Memcached APIs, built for caching and other data-intensive workloads.

OCaml web framework built from plain handler and middleware functions, with routing, sessions, WebSockets, GraphQL and HTTPS support.

Self-hosted platform that generates governed REST APIs over databases and file services for applications and AI models.

Python package that generates OpenAPI 3 schemas for Django REST framework APIs and serves them with optional Swagger UI and Redoc views.

Python package that generates Swagger/OpenAPI 2.0 specifications from Django REST framework APIs.

JavaScript library for product tours, element highlights and feature hints on web pages.

TypeScript ORM that maps SQL databases to typed schemas and queries, with a companion migration tool, Drizzle Kit.

C++ HTTP application framework for building web application server programs, with asynchronous I/O, routing, views, sessions, WebSockets and database access.

Java framework for building RESTful web services, combining Jetty, Jersey, Jackson, Logback and related libraries into one application package.

JavaScript library that turns an HTML element into a drag and drop zone for file uploads, with previews and progress display.

Open-source PHP content management system and framework built on Symfony components, with Twig theming and core JSON:API and REST modules.

Distribution of Drupal core that starts a site with preset recipes, site templates and marketing tools.

E-commerce module suite that adds online store features to Drupal sites.

Analytical SQL database that runs in-process inside Python, Node.js and other applications, with a WebAssembly build for browsers.

Static site framework for documenting component libraries, with demos rendered next to their source.

JavaScript library that draws interactive, zoomable charts of time series data.

Open-source PHP content management system for websites, blogs and intranets, with a plugin and theme system.

Embedded headless CMS that runs inside a Nuxt or Next.js app, with a typed local API, a REST API and an admin at /admin.

Open-source React email editor that builds MJML email templates with drag-and-drop editing.

Admin panel generator bundle for Symfony applications, with an optional commercial edition.

Command-line control panel that installs and manages WordPress sites on Nginx, PHP and MySQL, using Docker containers.

Drop-in JavaScript Markdown editor that replaces a textarea, with a toolbar, live rendering of Markdown syntax and autosave.

Self-hosted server management panel that deploys apps, databases and templated services on servers the user runs, using Docker.

Object-relational mapping library for Java and Kotlin with type-safe query beans, built-in database migrations and SQL-level control.

Go web framework built on the standard net/http package, with a radix-tree router, request binding, middleware and centralized error handling.

Open-source Jakarta EE application server, distributed as a server package and as an embedded executable JAR.

Eclipse's implementation of the Jakarta Faces specification for building Java web user interfaces.

Java widget toolkit for browser-based user interfaces with an SWT API, from the Eclipse Foundation.

Toolkit for building reactive applications on the JVM.

PHP architecture layer that adds CQRS, event sourcing, sagas and asynchronous messaging to Laravel, Symfony and Tempest applications through attributes.

Toolkit for data mapping and language integrated query in Elixir, with a query DSL and adapters for SQL databases.

Template engine for Node.js that renders markup from templates with JavaScript expressions, components and partials.

Block-style editor that saves its content as JSON, with each block type provided by a separate plugin.

State management library for JavaScript and TypeScript apps that tracks reactive units, with separate packages for React, Vue and Solid.

Node.js framework built on Koa for enterprise web applications and APIs.

Templating language that generates HTML from plain JavaScript written inside templates, for Node.js and the browser.

React component library, published as @elastic/eui, that Elastic uses to build its React applications.

WordPress plugin that connects a WordPress site to an Elasticsearch server for search.

Distributed search and analytics engine that stores and queries structured, unstructured and vector data over an HTTP API.

Ruby gem of Elasticsearch integrations for Ruby on Rails applications, maintained by Elastic.

Magento 2 extension that adds Elasticsearch and OpenSearch based search and merchandising to a Magento store.

Postgres sync engine that streams shaped subsets of Postgres tables over HTTP to client apps, self-hosted as a Docker image or run as Electric Cloud.

Clojure dialect and library for full-stack reactive web interfaces, whose compiler infers the frontend and backend boundary.

UI component toolkit for Vue 2 web applications, published as element-ui.

UI component library for Vue 3, written in TypeScript.

Static site generator that transforms a directory of templates in various languages into HTML.

Build-time utility that transforms raster and vector images into several sizes and formats and writes img and picture markup.

Functional language for reliable web applications, compiled to HTML or JavaScript.

Elm framework for building sites and web apps with server-rendered and pre-rendered routes.

PHP database toolkit with a query builder, an ActiveRecord-style ORM and a schema builder, distributed as the database component of Laravel.

TypeScript web framework for building backend servers, optimized for Bun and also runnable on Node.js.

Haskell library toolkit for building jamstack-style static sites with a live server that reloads on change.

Node.js library for creating, previewing and sending custom email templates.

Open-source email template builder that outputs JSON or HTML, with a React component for rendering the output.

PHP library that validates email addresses against several RFCs, with pluggable validation strategies.

Tool that renders plain-text notes as a website, with a live preview server while editing.

Lightweight asynchronous HTTP server library written in pure Swift for iOS, macOS and Linux.

JavaScript framework for building web applications, with a router, data layer and the Ember CLI build tool.

JavaScript carousel library with fluid motion, swipe gestures and a plugin system, usable with React, Vue, Svelte, Solid or plain JavaScript.

Full-stack TypeScript CMS built on Astro, with an admin panel, a REST API and a plugin system, that runs on Cloudflare or a Node.js server.

Kubernetes-native API gateway and Layer 7 load balancer built on the Envoy Proxy, configured through Kubernetes resources.

Lightweight open-source PHP blog and CMS for building websites.

Full-stack Python web framework designed with simplicity in mind.

Customizable emoji picker HTML component for the web.

CSS-in-JS library for writing styles with JavaScript, with packages for React and for other frameworks.

Static blog system built on Ember that is mostly compatible with Ghost and writes posts as Markdown files.

Backend framework for TypeScript and Go in which application code declares the infrastructure it uses, such as databases, Pub/Sub and cron jobs.

PHP library that generates QR codes as PNG, WebP, SVG, EPS or binary output.

HTML-first full-stack web framework for building server-rendered, multi-page web apps with Web Components.

Hosting control panel for running websites, email, databases and backups across one or more Linux servers in a single cluster.

Java platform for content management and web applications, with the Content Studio editor, a built-in content store and a GraphQL delivery API.

Entity framework for Go that models a database schema as Go code and generates a statically typed query API.

Next.js storefront template that uses Shopify for product data and Algolia as a middle layer for fetching and search.

Object-relational mapper for .NET that maps entity classes to databases and queries them with LINQ.

Static site generator that builds HTML from Pug templates or Markdown, with YAML data and Stylus styles.

Open source edge and service proxy for cloud-native applications.

Self-hosted error catcher, compatible with the Airbrake API, for collecting and managing errors from other applications.

Annotation-driven Java admin framework that generates an admin page for each JPA entity class.

JavaScript and TypeScript bundler and minifier, shipped as a native binary with a JavaScript API.

Mix tasks for installing the esbuild CLI and invoking it from Elixir projects, such as Phoenix applications.

Pluggable linter for JavaScript that reports and fixes problems in source code through configurable rules and plugins.

Embedded JavaScript template engine written in TypeScript that renders templates in Node, Deno and the browser.

React component library and design system from Segment.

Open-source TypeScript e-commerce platform built on Node.js and PostgreSQL, with a GraphQL API and React storefront and admin.

.NET library that indexes and searches data through a fluent API, wrapping the Lucene.NET search engine.

JavaScript library that reads, manipulates and writes spreadsheet data and styles in XLSX and CSV files.

Error and log reporting service with a self-hostable server, a web dashboard and client libraries for .NET and JavaScript.

Documentation generator that builds HTML, Markdown and EPUB documentation from the API docs of Erlang and Elixir projects.

Elixir library for defining test data factories and associations, used with Ecto and configurable for other persistence libraries.

File-based router for universal React Native apps that run on Android, iOS and the web, part of the open-source Expo platform.

Kotlin SQL library with a typesafe query DSL and a DAO API for database access.

Minimalist web framework for Node.js for building web applications and APIs.

Express.js middleware that exposes the validator.js validators and sanitizers for checking request data.

Self-hosted PHP content management system with custom content channels and HTML template tags.

TypeScript framework for building server-side Node.js applications, with dependency injection and an Express adapter.

Python library that runs shell commands on remote hosts over SSH and returns the results as Python objects.

JavaScript HTML5 canvas library for interactive objects, with SVG and JSON import and export.

Header-file C library for evented network services, with an HTTP, WebSocket and Pub/Sub server.

Ruby library for defining factories that build test data objects, a replacement for fixtures.

Python library that builds test objects from declarative factory classes, as a replacement for static test fixtures.

Rails CMS engine that generates models, controllers and views into the host Rails application.

Static site generator that builds a website from a folder of audio files, for audio producers.

JavaScript library that generates fake but realistic data for testing and development, in the browser and in Node.js.

Python package that generates fake data for tests, database seeding and anonymized datasets.

PHP library that generates fake data for tests, database seeding and anonymized datasets.

Language-agnostic, persistent background job server with a web UI, from which workers in any language fetch jobs.

F# toolkit for building full-stack web applications on ASP.NET Core.

Python framework for building REST APIs and microservices on WSGI and ASGI servers.

Multi-process, multi-fiber Rack-compatible HTTP server for Ruby web applications, with HTTP/2 and TLS.

JavaScript and TypeScript toolkit of UI components, the Fancybox lightbox, Carousel slider and Panzoom zoom and pan.

Ruby HTTP client library that gives one interface over several HTTP adapters and Rack-style middleware.

Web build tool written in Rust that bundles web projects with a Vite-compatible configuration and development server.

Library for building Web Components based on W3C standards, published by Microsoft.

Property-based testing framework for JavaScript and TypeScript that generates inputs to check properties of code.

Python web framework for building APIs from standard Python type hints, served by an ASGI server.

PHP framework for API services, built on PSR standards, with an optional Swoole server mode.

Light-weight framework for building REST API endpoints on ASP.NET, one endpoint class per request.

JavaScript validation library that compiles an object schema into a checker function for Node.js, browsers and Deno.

Python web framework that builds interactive web applications from server routes that return HTML.

Node.js web framework for building HTTP APIs and web applications, with a plugin architecture and schema-based validation.

Server control panel for creating and managing websites, email accounts, databases, SSL certificates and backups on a Linux server.

Go backend-as-a-service that generates a database, REST endpoints and an admin dashboard from schemas, and can also be embedded as a Go web framework.

PHP micro-framework for building dynamic web applications, with routing, a template engine, database mappers and a plug-in set, installed with Composer.

Open-source web analytics server written in Go, the Lite edition of the hosted Fathom Analytics product.

Node.js module that generates favicons and their associated icon and web app manifest files from a source image.

Open-source feature flag platform that can be self-hosted or used as FeatBit Cloud, with SDKs for application code.

Open-source collection of SVG icons, with an npm package for JavaScript projects.

Full-stack framework for creating web APIs and real-time applications with TypeScript or JavaScript.

Open-source feature management service for feature toggles, gradual rollouts and A/B tests, self-hosted with Docker Compose.

Open-source feedback portal and changelog for product teams, built with Next.js and Supabase.

Django-based CMS that adds admin interfaces for custom page content types.

Django toolkit of building blocks for building a content management system.

F# wrapper around the React API for building React applications, compiled to JavaScript with Fable.

Form library for Svelte, Solid and React that makes plain HTML forms reactive through stores and actions.

Web server written in Rust that serves static files, reverse-proxies requests and obtains TLS certificates automatically.

Java enterprise search server with a built-in crawler, an admin console and a search UI, built on OpenSearch.

Express-inspired web framework for Go, built on Fasthttp.

UI framework for Laravel for building admin panels and apps from Livewire-based tables, forms and other components.

JavaScript file upload library that turns file inputs into a drop area with previews, validation, image processing and uploads.

Framework agnostic form state management library in which subscribers update only on the form state they select.

Scala framework for building HTTP and Thrift services on top of TwitterServer and Finagle.

Relational database server with ANSI SQL features, stored procedures and triggers, developed as a community project from the InterBase source code.

Admin panel and CMS for Firebase Firestore data, built as a React and TypeScript application.

Minimalist JavaScript library that sends HTTP requests from attributes on HTML elements and swaps the response into the page.

Open-source feature flag evaluation daemon that serves flag definitions over gRPC and HTTP, compatible with OpenFeature.

Open-source feature flag and remote config platform, available self-hosted or as a cloud service, with SDKs for web, mobile and server-side apps.

Go web framework for building modular, pluggable web applications and microservices.

Go modules for building headless e-commerce applications, covering product, cart, checkout and payment, on the Flamingo framework.

Python micro-framework for building web applications on the WSGI interface.

Flask extension that adds i18n and l10n support to Flask applications.

Flask extension that manages user sessions, handling logging in, logging out and remembered sessions for Flask applications.

Python extension for Flask that adds support for building REST APIs and documenting them with Swagger.

Flat-file PHP blogging engine that stores its content in files instead of a database.

Java implementation of the CommonMark Markdown parser, with extension modules and HTML, PDF and DOCX output.

Open-source usage-based billing platform with metering, credits, pricing plans and invoicing, run through an API and available as a hosted cloud service.

Full-text search library for browsers and Node.js that keeps its index in memory or in a database.

Flat-file content management system written in PHP that stores content as files and offers a built-in REST API.

Carousel component for web pages, with a plain JavaScript package and React and Vue 3 ports.

Extensible micro-framework for PHP for building RESTful and classic web applications, installed with Composer.

Git-native feature flag platform that serves flags from a single self-hosted binary, with REST and gRPC APIs and SDKs.

Collection of Tailwind CSS UI components and website templates for React, copied into a project rather than installed as a package.

JavaScript library that positions floating elements such as tooltips, popovers and dropdowns next to their anchors, with React and Vue bindings.

PHP web application framework focused on Domain-Driven Design and clean code, installed with Composer.

Open-source UI component library built on Tailwind CSS, with a JavaScript file for interactive components.

React component library built with Tailwind CSS, based on the core Flowbite components.

Svelte component library built on Tailwind CSS, from the Flowbite component set.

Vue 3 component library built on Tailwind CSS and Flowbite.

Web application for monitoring and managing Celery task queue clusters, showing worker and task status in real time.

C# library of extension methods for expressing assertions in .NET unit tests, for MSTest, NUnit, xUnit, MSpec and TUnit.

Component library for ASP.NET Core Blazor applications, built to the Fluent design language.

React component library of the Fluent UI design system, published by Microsoft.

Icon set of familiar icons from Microsoft, shipped as SVG files and as native Android, iOS and Flutter libraries.

JavaScript implementation of Project Fluent, a localization framework for translations with plurals, genders and grammatical cases.

A .NET library for building strongly-typed validation rules.

UI component library for Livewire applications, styled with Tailwind CSS, with a paid Pro tier.

Native local development environment for Windows, macOS and Linux that runs runtimes, databases and web servers on the host, with local sites, HTTPS and an MCP server for AI coding agents.

Dockerized image server that resizes, crops and converts images on the fly from URL options, with caching.

Open-source Tailwind CSS component library with semantic class names and JavaScript plugins.

Node.js framework for creating web applications, written in TypeScript.

A Python library that builds interactive Leaflet.js maps from Python data.

Community fork of Semantic UI, a CSS and JavaScript framework for responsive layouts built from descriptive HTML class names.

Icon library and toolkit distributed as web fonts, SVG and CSS, with free icon styles and paid Pro styles.

Open source content management system written in PHP.

Open-source form and API platform for building forms, storing their submissions in MongoDB and serving them over an API, with a paid self-hosted Enterprise Server.

A set of JavaScript libraries for internationalization built on ICU MessageFormat and the ECMA-402 Intl APIs.

Open-source experience management and survey platform, self-hosted or offered as a hosted cloud service.

Open-source headless CMS built with ASP.NET Core and React, with a REST and GraphQL API and an MCP server for AI agents.

An open source form library for React and React Native that holds form values, validation and submission state.

Form framework for React and Vue that builds inputs, validation and nested form data from one component.

JavaScript library that builds multi-step forms and surveys on a web page or in a web app, with the form defined in code or in a Markdown-like text syntax.

Rails form builder that renders semantic, accessible HTML forms through a Ruby DSL.

Scriptable static site generator that defines page layouts in F# scripts.

Symfony bundle that connects a Symfony application to Elasticsearch through the Elastica client.

Responsive HTML email framework with grid, component and typography styles that render in email clients, including Outlook.

PHP micro framework for building web applications and APIs on an event-driven, non-blocking runtime.

Open-source framework for building mobile, desktop and web apps with native-looking UI components.

Application server for PHP written in Go that embeds the official PHP executor in the Caddy web server.

Static site generator written in Julia, oriented towards technical blogging and light pages.

JavaScript library for simple, responsive SVG charts with no dependencies.

Python and JavaScript low-code web framework for building data-driven web applications, with a built-in admin interface, roles and permissions.

JavaScript library that draws configurable, interactive Gantt charts for the web.

HTTP and reverse proxy server, written in C, that the project describes as an effort to preserve free and open development of nginx.

Object-relational mapper for .NET that supports many relational and analytical databases, with code-first migrations and navigation properties.

Python library that mocks the datetime module so tests can run as if at a chosen point in time.

Web framework for Deno that renders every route on the server as a Preact component and hydrates interactive islands.

Lightweight, typesafe library for building reactive web apps in Kotlin, with a set of headless components.

Commercial JavaScript WYSIWYG HTML editor with a set of plugins, framework integrations and server SDKs.

Visual Studio Code extension that works as a headless CMS for static site generators, with dashboards for content, data and media inside the editor.

Maven plugin that downloads Node and npm for a project and runs npm, Yarn, Grunt, Gulp, Webpack and other frontend tools as part of the Maven build.

Server management panel for managing hosting domains, customers, e-mail, FTP accounts and MySQL databases on a server, written in PHP.

Flask extension that freezes a Flask application into a set of static files.

Reverse proxy that exposes services behind a NAT or firewall to the internet through a server with a public IP address, written in Go.

Go web framework for building APIs and web applications, generating OpenAPI documentation from handler code.

Clojure and ClojureScript library for building single-page full-stack web applications on React.

JavaScript event calendar with drag and drop, views and plugins, published as an MIT-licensed core with a separate premium plugin set.

Shadcn-compatible component library and blocks for content-driven websites in Astro, React and Shopify Liquid.

JavaScript library that builds fullscreen scrolling websites with sections and horizontal slides inside them.

React documentation framework that composes into an existing React framework to build docs sites.

Lightweight fuzzy-search library written in TypeScript, with no dependencies, for searching in browsers and on servers.

Self-hosted, open-source API management platform and API gateway, written in PHP.

Customer identity and access management server, self-hosted or hosted by FusionAuth, with a free Community edition.

JavaScript library that fuzzy-matches search text against strings and object properties, with scores and highlighting.

JavaScript port of the main matching algorithm of the FZF fuzzy finder, for ranking a list of strings in the browser.

JavaScript visualization grammar for building charts, dashboards and data stories.

Charting library for interactive, responsive statistical charts, built as a wrapper around the G2 grammar-of-graphics library.

TypeScript graph visualization engine for drawing, layout, analysis and interaction on nodes and edges.

Documentation tool that builds HTML pages from Markdown files, written in Groovy.

S3-compatible object storage server for self-hosted, geo-distributed deployments, written in Rust.

Validation library for Rust that checks struct fields and enum variants against rules declared with a derive macro.

High-performance cache-store server from Microsoft Research that speaks the RESP wire protocol, written in C# on .NET.

Load testing tool that runs performance scenarios written as code and produces an HTML report for each run.

React-based framework for building websites from a GraphQL data layer, pre-rendered at build time or rendered on request.

Open source acceptance testing framework whose specifications are written in Markdown.

Embeddable C# web server and framework for building REST APIs and websites on .NET.

Julia full-stack web framework for building data-centric web apps, backends and APIs.

Java headless CMS that keeps its content in a relational database reached through a JDBC connector and serves it over REST and GraphQL APIs.

Bash script that obtains and renews SSL certificates from Let's Encrypt ACME servers, copies them to remote servers and reloads services.

Elixir library implementing the Gettext internationalization and localization system.

Open-source publishing platform for websites, email newsletters and paid memberships, with Handlebars themes and a read-only content API.

Go web framework with a Martini-like API for building web services, REST APIs and web applications.

Go testing framework that organizes specs in nestable Describe, Context and When containers, paired with the Gomega matcher library.

F# micro web framework for building web applications on ASP.NET Core.

Comments system that stores a site's comments as GitHub Discussions and shows them on the page through a script tag.

Git command that uploads only the files changed since the last deployment to FTP, FTPS, FTPES and SFTP servers.

TypeScript API library that reads blog posts, comments and labels from the issues of a GitHub repository.

GitHub Action that pushes a project's built folder to a branch that GitHub Pages serves.

Static page generator that turns a Git repository into HTML pages for its files, commits and code.

Lightweight LDAP server written in Go, with user directories held in flat files, S3, SQL databases or another LDAP server.

PHP static site generator that builds plain HTML from Djot content and Sugar templates.

PHP library that resizes, crops and applies effects to images on demand through an HTTP API.

Dependency-free JavaScript ES6 slider and carousel.

Dependency-free JavaScript scrollable list with paging controls, which its project presents as a carousel alternative.

Pure JavaScript lightbox that shows images, videos, iframes and inline content.

Open-source error tracking platform that works with Sentry client SDKs, self-hosted or hosted by GlitchTip.

JavaScript library for internationalization and localization that formats and parses numbers, dates and messages from Unicode CLDR JSON data.

Ruby gem that adds translated attribute values to ActiveRecord models in Rails.

Node.js static website generator that builds sites from Markdown pages and Tailwind CSS.

Copy-paste component and pattern library for React Native and Expo, styled with Tailwind CSS through NativeWind.

Command-line tool that finds the glyphs a web page uses and subsets web font files to them.

Open-source, OpenFeature-native feature flag system whose flags are YAML files, served by a relay proxy or a Go module.

Go framework for building gRPC and HTTP API services, with a MongoDB object model, Temporal workers and a bootstrap command-line tool.

Go package for building progressive web apps whose UI is written in Go and compiled to WebAssembly.

Image proxy server that fetches non-secure images over SSL/TLS for pages served over HTTPS and checks HMAC-signed image URLs.

Go library that builds charts from Go code and renders them as HTML pages that load Apache ECharts resources.

Go package and command for translating Go programs into multiple languages with message files and CLDR plural rules.

PostgreSQL client and ORM for Go.

Go web and RPC framework with code generation from API definitions, built-in resilience components and the goctl command-line tool.

Open source real-time web log analyzer with a terminal view, a self-contained HTML report and JSON and CSV output.

Open source web analytics platform, self-hosted or hosted, that counts pageviews with a script tag and avoids personal data.

Single-user, multi-blog publishing platform written in Go, with IndieWeb and ActivityPub support.

Go testing tool that works with go test and offers a behavioral test style with an optional browser view of the results.

Full-text search engine written in Go, run as a standalone HTTP server with its own index and admin interface.

Go framework for building microservices and REST APIs, with observability, datasource integrations and messaging built in.

Modular Go framework for web services, components and full application projects, with a code-generation CLI.

Partially Jekyll-compatible static site generator written in Go, with build and serve commands and live reload.

JavaScript and TypeScript library for creating interactive diagrams, charts and graphs in the browser or on Node.js.

Go library that parses Markdown into a syntax tree and renders it to HTML, CommonMark-compliant and extensible.

Go library that parses Markdown and renders it as HTML, with an optional CommonMark mode.

Mocking framework for Go that generates mock implementations of Go interfaces, with the mockgen tool.

CSS-in-JS library whose styled API is inspired by emotion.

Plugin-first CMS with a Go backend, a React admin built on the Gutenberg block editor and optional Astro themes, backed by PostgreSQL.

Go SQL builder and executor with an expressive query DSL that generates SQL for several database dialects.

Go web application framework with routing, an ORM, queues, sessions and a console, organized in the structure of Laravel.

HTTP request router and URL matcher for Go web servers, implementing the standard http.Handler interface.

Go ORM library that maps structs to database tables, with associations, hooks, transactions and auto migrations.

Push notification server that sends iOS, Android and Huawei notifications through a web API, a command line or gRPC.

Go UI component library of templ components for server-rendered web applications.

Static site generator written in Go that re-renders only the pages affected by a change, configured through a Makefile-style file.

Human-friendly HTTP request library for Node.js with promise and stream APIs, retries, timeouts and RFC 7234 caching.

Docker-based HTTP API that converts web pages and office documents to PDF and manipulates PDF files.

Go package for writing authentication providers, so Go web applications can sign users in through OAuth and other protocols.

Rust web framework for statically typed, async HTTP applications.

Self-hosted message server that accepts messages over a REST API and delivers them to clients over a WebSocket connection.

CSS, JavaScript and Nunjucks components for building government services in the style of GOV.UK.

Go package of validators and sanitizers for strings, structs and collections.

Headless content platform in Go, with an admin console, multi-tenant and multi-site management, and Vue, React, Taro and Flutter frontends, built on go-kratos.

Go REST API framework with routing, validation, database access and a configuration system in one package.

Static site generator written in Go that converts Markdown and djot pages to HTML, with an XML sitemap and an RSS feed.

Go library for building GraphQL servers from a GraphQL schema, with Go code generated from it.

Python package for building web interfaces and demos for machine learning models and Python functions.

Open source application for querying, visualizing, alerting on and exploring metrics, logs and traces.

Horizontally scalable log aggregation system that indexes log labels rather than the text of log lines.

Open source distributed tracing backend that ingests Jaeger, Zipkin and OpenTelemetry traces and stores them in object storage.

TypeScript GraphQL client for JavaScript that sends documents over HTTP and in-memory transports, formerly published as graphql-request.

Groovy-based web application framework for the JVM, built on Spring Boot.

Open-source e-commerce platform built on ASP.NET Core and MongoDB, with multi-store and multi-vendor support.

Rust HTTP server that serves Python applications written to the ASGI, RSGI and WSGI interfaces.

Ruby framework for building REST-like APIs that run on Rack and mount alongside Rails or Sinatra.

Open-source web builder framework that adds a visual editor for HTML templates to an application.

Python library for building GraphQL APIs with a code-first approach.

Python library that adds GraphQL APIs built with Graphene to Django projects.

Plugin-based command-line tool that generates typed code from a GraphQL schema and its operations.

Java implementation of the GraphQL specification for building GraphQL servers on the JVM.

Framework for composing REST, OpenAPI, gRPC, SOAP, database and GraphQL sources into a GraphQL federation supergraph.

A collection of npm packages for building, mocking and stitching GraphQL schemas and resolvers in JavaScript.

Fully-featured GraphQL server library for JavaScript that runs on the WHATWG Fetch API across Node.js and other JavaScript runtimes.

Go implementation of GraphQL that follows the graphql-js reference implementation.

PHP library that implements the GraphQL specification, providing the type system, validation and execution of GraphQL queries.

Ruby implementation of GraphQL for defining schemas, executing queries and serving them from Ruby applications.

Zero-dependency GraphQL over WebSocket server and client library for JavaScript, with adapters for common WebSocket servers.

JavaScript implementation of the GraphQL specification, providing the parser, validator, executor and type system used to build GraphQL servers, clients and tools.

GraphQL implementation for .NET that provides the query execution engine and schema types for C# applications.

PHP library that defines a GraphQL API from attributes on PHP classes and controllers, independent of any framework.

Rust web framework, inspired by Express, for building web services and microservices.

TypeScript GraphQL server that combines databases, REST APIs and SaaS platforms into one API, with an admin panel for the connected data.

Sass compiler written in Rust that turns Sass stylesheets into plain CSS, as a library and a command-line binary.

Flat-file PHP content management system that stores pages as Markdown and YAML files without a database.

API management platform with an API gateway, a management console and a developer portal, published as open source with an Enterprise Edition.

Free and open log management platform that collects log data from applications and devices for search and analysis.

Static site generator and web app framework built on web standards, with static, server-rendered and client-rendered pages.

Free and open-source JavaScript table plugin that works with React, Angular, Vue and plain JavaScript.

Desktop client for writing Markdown blog posts in a GUI and publishing them as a static blog.

CSS-in-JS library that defines styles as JavaScript objects and can compile them ahead of time.

Relational spreadsheet that combines spreadsheet formulas with database tables, self-hostable as grist-core and available as a hosted service.

React component library with theming, responsive layouts, and keyboard and screen reader support.

Open-source full-text search engine and column store, provided as a C library and as a built-in server command.

Open-core feature flagging, experimentation and product analytics platform, available self-hosted or as a cloud service, with SDKs for application code.

JavaScript task runner that automates repetitive project tasks such as minification, compilation, unit testing and linting, configured through a Gruntfile.

JavaScript animation library, with plugins for scroll, SVG, text and UI animation, that runs in the browser.

Token-based authentication library for Elixir applications, with JSON Web Tokens by default and Plug integration.

JavaScript toolkit that automates build and workflow tasks by composing single-purpose tasks and plugins into streaming pipelines defined in a gulpfile.

WSGI HTTP server for UNIX that runs Python web applications with a pre-fork worker model.

Node.js-powered website creator that builds component-oriented sites from HTMLisp templates, TypeScript and Markdown.

CSS stylesheet that reformats web pages for printing, with classes for page breaks and hidden elements.

WordPress block editor project whose @wordpress/block-editor npm package lets other applications create standalone block editors.

PHP HTTP client library for sending HTTP requests and integrating with web services.

Java framework that compiles Java source code to JavaScript for building AJAX web applications that run in the browser.

HTTP server framework for JavaScript runtimes, built on the Request, Response and Headers primitives of the web platform.

Haskell library for compiling static websites from rules written in Haskell, with Pandoc for Markdown and TeX.

CSS framework that works as a drop-in replacement for Bootstrap's stylesheet, with three built-in themes and dark mode.

Open-source site-building tool for blogs, knowledge bases and company websites, written in Java on Spring Boot.

Ruby templating engine for HTML that uses indentation and a short syntax instead of closing tags.

Ruby web framework for building maintainable apps and APIs, with a dedicated database layer and modular architecture.

JavaScript templating engine that compiles Handlebars templates into functions that render HTML, text and other output.

JavaScript data grid that looks and feels like a spreadsheet, with versions for React, Angular and Vue.

Open-source authentication backend for passkeys, passwords and passcodes, with web components for login and registration flows.

Node.js framework for building HTTP servers and applications, distributed as the @hapi/hapi package.

JavaScript implementation of a web browser's DOM without a graphical interface, used for testing and server-side rendering.

Macro-oriented asynchronous full-stack web framework written in Nim.

Load balancer and reverse proxy for TCP and HTTP applications, built as a single multi-threaded daemon.

Markdown and Handlebars static site generator for blogs, docs sites and landing pages, started with the create-harold-app scaffolder.

Node.js static web server that serves Markdown, EJS, Jade, Sass and other source files as HTML, CSS and JavaScript, and compiles them into a static folder.

Server for storing, accessing and encrypting secrets, with an HTTP API, a CLI and a web interface, that applications can call for credentials and keys.

Self-hosted PHP comment system that adds a comment section to any website and stores comments in SQLite or MySQL.

Static site generator that turns Markdown content and Jinja templates into HTML pages.

Static site generator written in Nim that builds a site from Markdown contents and Mustache templates.

Open-source GraphQL server that generates a GraphQL API over existing databases and other data sources, with a hosted Hasura Cloud edition.

Self-hosted content management system written in Go that runs as one binary next to a Postgres database.

Orchestration engine for background tasks, durable workflows and AI agents, self-hostable with Docker or Helm and also offered as Hatchet Cloud.

Self-hosted bridge that makes a static site's pages and posts reachable from the fediverse through ActivityPub.

Set of JavaScript packages for building HTTP server applications, with handlers that return standard Response objects.

Library that implements React's Hooks API for standard web components and lit-html or hyperHTML templates.

Django app that puts one search API in front of pluggable backends such as Solr, Elasticsearch, Whoosh and Xapian.

Unstyled, accessible UI components for React and Vue, designed to work with Tailwind CSS.

Minimal Jekyll clone for Node.js that builds a site from Jekyll-style folders with Mold templates.

Graphical desktop client for managing MariaDB, MySQL, SQL Server, PostgreSQL, SQLite, Interbase and Firebird databases.

Cloud-native open-source Java framework for writing microservices on a web core that runs on virtual threads.

Scala toolkit for building static websites from typed HTML templates, with a static site generator and reusable UI components.

Flat-file content management system in PHP that keeps pages as text files and renders them with Twig.

Go package that generates clean, responsive HTML e-mails and plain text versions for transactional mail.

Set of free, MIT-licensed SVG icons for user interface development, with React and Vue packages.

Open-source component library for React web and React Native applications, built on React Aria Components and Tailwind CSS.

Golang HTTP framework for building microservices, published by the CloudWeGo project.

Web control panel for Debian and Ubuntu servers that manages web domains, mail, DNS zones and databases from one dashboard.

Open-source user infrastructure platform for authentication, teams, payments, email and analytics, with a managed cloud and a self-hostable server.

Node.js blog framework that generates static websites from Markdown posts and a theme.

Hugo theme built with Tailwind CSS for documentation, blog and other static websites.

Code generator that turns OpenAPI specifications into TypeScript clients, schemas and other generated code, published as @hey-api/openapi-ts.

Open-source form builder for conversational forms, surveys and quizzes that can be embedded in a website.

Open source web server for Unix-like systems, focused on security and a small footprint, with CGI, FastCGI and reverse proxy support.

Object/relational mapping library for Java that maps classes to relational database tables and implements the Jakarta Persistence specification.

Java library that indexes Hibernate ORM entities into Apache Lucene or Elasticsearch and runs full-text queries against them.

Java reference implementation of Jakarta Validation that checks JavaBeans and method arguments against annotated constraints.

Go web and CLI application framework with dependency injection and auto configuration, in the style of Spring.

JavaScript charting library that draws charts with SVG and some canvas and WebGL.

JavaScript syntax highlighter with automatic language detection that runs in the browser and on Node.js.

Static site generator that builds routes from the directory layout of its source files, installed from the hikarujs npm package.

CSS framework of responsive typography, input styling and custom properties, written as a PostCSS foundation for custom styles.

Vite-based tool that builds interactive story books of components for Vue, React and Svelte.

Web analytics server that ships as one Go binary and records visits and conversions through a script added to a site's pages.

PHP framework for websites, web applications and small services, with a service container and an optional asynchronous mode.

JavaScript library that plays HTTP Live Streaming video in browsers through HTML5 video and Media Source Extensions.

WebSocket backend for Yjs documents that syncs changes between clients in real time, from the team behind Tiptap.

Elixir full-stack web framework whose client-side code runs in the browser as Elixir, compiled to JavaScript.

Web framework built on Web Standards that runs on any JavaScript runtime.

Headless CMS framework that generates REST and GraphQL APIs from Drizzle schemas and runs on Hono.

Open-source webhook server that receives events from an application through a REST API and delivers them to subscribers' endpoints, with retries, signatures and delivery logs.

State management library for React that is built on the React state hook.

ClojureScript library for building single-page web applications from composable elements that bind to Javelin cells.

GraphQL server for .NET that builds a GraphQL schema from C# classes and runs on ASP.NET Core.

JavaScript audio library for the modern web that plays sounds through the Web Audio API with an HTML5 Audio fallback.

HTML filter library written in PHP that removes XSS attacks and makes the output standards-compliant HTML.

JavaScript HTML minifier that also minifies inline CSS and JavaScript, usable from the command line and from Node.js.

Static HTML website generator written in FreePascal and Lazarus, with content kept in SQLite.

Blogging platform and flat-file CMS in PHP that stores its content in files and needs no database.

Dependency-free browser library that lets HTML attributes make AJAX requests, use CSS transitions, WebSockets and Server-Sent Events.

Kotlin toolkit for serving and consuming HTTP services, in which an HTTP application is a Kotlin function.

Scala library for typeful, functional and streaming HTTP servers and clients, built on FS2 and cats-effect.

Go library for parsing HTTP requests, writing responses and returning RFC 9457 problem responses, with a stdlib-only core module.

Self-hosted system for building agents that watch the web and incoming events and take automated actions on the user's behalf.

Static site generator written in Go that builds websites from Markdown content and Go templates.

Go micro framework for building HTTP REST and RPC APIs, backed by OpenAPI 3 and JSON Schema.

Swift web framework built on SwiftNIO for server-side web applications and APIs.

Static site generator, distributed as a Crystal binary, that builds Markdown content with Jinja2-compatible templates into a public folder.

JavaScript framework for building web components, component libraries and client-side web applications.

Static site generator built on Laravel Zero that compiles Markdown and Blade files into a static HTML site.

ASGI and WSGI web server for Python applications, supporting HTTP/1, HTTP/2 and WebSockets.

Open-source observability platform that searches and visualizes logs, traces, metrics, errors and session replays on top of ClickHouse, ingesting OpenTelemetry data from applications.

Node.js web server for HTTP and WebSocket endpoints, powered by uWebSockets.js, with limited compatibility with the Express API.

PHP coroutine framework for building microservices, middleware and web services on the Swoole or Swow engine.

Open-source payments orchestration platform that routes transactions across payment processors, with a vault, a control center and reconciliation, self-hosted or hosted by Juspay.

Free collection of Tailwind CSS components that are copied into a project as markup.

Laravel-style PHP framework with native coroutine support, for web applications and APIs running on Swoole.

Self-hostable email API for developers that sends transactional email over SMTP through the sender's own servers, with delivery logs, bounce handling and webhooks.

PHP content management and digital experience platform, the open source edition of Ibexa DXP, built on Symfony.

React-based application framework for building single-page, server-rendered and statically built apps.

Unified icon framework that loads open source icons from any icon library on demand.

Open source SVG icon set with packages for React, React Native, Vue, Flutter and CSS.

Static site builder for Swift developers that writes websites in a SwiftUI-like Swift API and builds them to HTML.

Angular component library from Infragistics, part MIT-licensed and part under a commercial license.

Haskell web framework that generates records and routes from a schema file and checks SQL and HTML templates at compile time.

FastCGI image server that streams tiles of very large images to web viewers using the IIP, IIIF, Zoomify and DeepZoom APIs.

Wiki compiler that builds wiki pages into a static website, storing page history in a revision control system, with blogging support.

Content management system in PHP for clan and community websites, with installable modules and designs.

Static site generator with partial hydration, for sites whose pages and layouts are Vue components.

Ruby command line tool and library that optimizes JPEG, PNG, GIF and SVG images by running external compression utilities.

Image processing library and command-line tool for resizing, cropping and encoding images.

JavaScript library that minifies image files and image data, with plugins that do the optimization.

GUI image optimizer for macOS that runs several lossless image compression tools on dropped files.

Image processing server and Go library that resizes, crops and filters images with libvips, using the thumbor URL syntax.

Friendly full-stack programming language for the web that compiles to JavaScript.

Server for on-the-fly image processing, resizing and format conversion, driven by URL parameters.

Chinese-language PHP framework for long-connection microservices, running on PHP-FPM, Swoole, Workerman or RoadRunner.

Ruby gem that adds import maps to Rails so JavaScript ES modules load in the browser without transpiling or bundling.

Community-built PHP and MySQL content management system with multilingual content and a module system.

Email testing server that accepts mail for any address over SMTP and shows it in a web interface, with REST and POP3 access.

Adapter protocol and client libraries for building single-page React, Vue and Svelte apps on top of server-side routing.

React-like JavaScript library for building user interfaces on the client and the server.

.NET search engine library that indexes documents and answers fuzzy queries with ranking, filters and facets.

AI-native database server that runs hybrid search over dense and sparse vectors, tensors, full text and structured data.

Open-source platform for managing application secrets, certificates and cryptographic keys, with a CLI, SDKs and a self-hostable server alongside Infisical Cloud.

Laravel package that generates CRUD code, APIs and admin panel views for a model from the command line, a file or database tables.

Static blog generator written in Go that builds Markdown articles from YAML configuration and a theme.

Workflow orchestration platform for durable functions with step retries, scheduling and flow control, run by applications through language SDKs and self-hostable as a single server.

Privacy-friendly web analytics tool that a site owner deploys to their own Cloudflare account and embeds with a small script.

Collection of reusable Vue and Nuxt components, built with shadcn-vue, motion-v and Tailwind CSS, that are copied into a project.

Open-source backend for web and mobile apps with a client-side, real-time database, auth, permissions, storage and streams.

JavaScript client library that connects a Meilisearch index to the InstantSearch.js front-end search UI library.

Open source JavaScript UI library of widgets that builds a search interface on Algolia's search API, with React and Vue wrappers.

Self-hosted visual CMS that edits pages on a canvas and publishes them as static HTML, served by one Bun server.

Collection of accessible React components that are copied into a project and styled with Tailwind CSS.

PHP image processing library for creating, editing and composing images through one API over GD, Imagick or libvips.

C-powered HTTP and WebSocket application server for Ruby Rack applications, with built-in Pub/Sub.

Open source UI toolkit of components for building cross-platform mobile and web apps with React, Angular or Vue.

Open-source icon set from Ionic, for web, iOS, Android and desktop apps.

Image optimizer that serves images in any size and format from a URL, using sharp for raster images and svgo for SVG.

Go web framework for building web applications and APIs, with routing, middleware, MVC controllers and template engines.

Static site generator built with .NET that turns Razor and Markdown files into static HTML.

Open source hosting control panel for managing websites, MySQL databases and cron jobs on Linux servers from a web browser.

Self-hosted commenting server written in Python, with a JavaScript client and SQLite storage, that a site embeds to add comments to its pages.

JavaScript library that runs a faceted and full-text search engine over an in-memory array of JSON objects in Node.js or the browser.

Design system from Bentley Systems with a React component library, CSS and design-token packages.

Open-source distributed tracing platform that collects, stores and shows traces from requests that cross services.

Post-build optimizer that compresses and optimizes the static output of a site generator, with image, CSS, JavaScript and HTML passes.

Python static site generator that builds websites from Jinja templates and works with the Flask library.

Open-source identity and access management server with OAuth 2.0, OpenID Connect, SAML, FIDO2 and SCIM, installed on virtual machines, Docker or Kubernetes.

Dart web framework for building websites with client-side, server-side and static rendering.

Java and Kotlin web framework for building web applications and APIs.

Java-based static site and blog generator that bakes AsciiDoc, Markdown and HTML content into a static website.

Ruby static site generator that turns plain text, Markdown and Liquid templates into websites and blogs.

Jekyll plugin that adds a CMS-style graphical admin interface for authoring content and administering Jekyll sites.

Repository template for a Jekyll website whose content is written in AsciiDoc, published to GitHub Pages by a GitHub Actions workflow.

Bash-based static blog generator that builds dated Markdown files into a blog directory.

Type-safe SQL builder for Go with code generation from a database schema and automatic query result mapping.

JavaScript library that filters a list or table already rendered in the page by generating one CSS rule from the search term.

Java web server and servlet container for deploying web applications.

Web framework written in Zig for building web applications.

Static site generator that builds sites from Blade templates and Markdown content.

Copy-and-paste collection of React Aria Components styled with Tailwind CSS, meant to sit alongside shadcn/ui components.

Modular web framework for Java and Kotlin.

Free and open-source PHP content management system for publishing web content, run by a volunteer community.

Command-line utility that optimizes and compresses JPEG files with lossless Huffman table optimization and optional lossy quality limits.

JavaScript library that simplifies HTML document traversal and manipulation, event handling, animation and Ajax.

Curated set of user interface interactions, effects, widgets and themes built on the jQuery library.

JavaScript library for client-side full-text search over arrays of JavaScript and JSON objects, with tokenizers, stemming and stop words.

Rails gem that bundles JavaScript with Bun, esbuild, rollup.js or Webpack and delivers the output through the Rails asset pipeline.

Documentation generator that builds HTML API documentation from comments placed in JavaScript source code.

Node.js content management system with in-page editing, built on the jsHarmony framework and publishing static pages.

Command-line package manager and development server that generates and maintains browser import maps for ES module projects.

Open-source reporting server that renders PDF, Excel, DOCX and other documents from HTML and JavaScript templates.

Online shop software from JTL-Software-GmbH, written in PHP.

Open-source tool for building publication-quality books, documents and websites from Markdown files and Jupyter notebooks.

Laravel-based content management system for building websites such as blogs, news portals and video sharing platforms.

Java library for building interactive web applications from widgets, rendered with Ajax or plain HTML.

E-commerce plugin for the Grav CMS that adds a catalog, checkout, payments, shipping and customer accounts.

Python static site generator that builds websites from Jinja2 templates, with a frontend built by Vite.

Command-line tool that deploys web apps packaged as Docker containers to servers over SSH, with zero-downtime switching.

Open-source identity management server with passkeys, OAuth2 and OpenID Connect, LDAP, RADIUS and Linux login integration, written in Rust.

Python static site generator that uses Jinja2 templates and Markdown, with blog and tag index support.

TYPO3 extension that indexes pages, content elements and records from the TYPO3 database and offers full-text search with faceted filters.

React component library of pre-designed UI components built on Tailwind CSS.

Routing software for Linux that provides load balancing with IPVS and high availability with VRRP.

Web framework for Crystal for building web applications and APIs, with routing, middleware, JSON handling and WebSocket support.

Commercial JavaScript UI component library for jQuery, with an open-source Kendo UI Core subset.

Open-source orchestration platform for data, AI and infrastructure workflows, defined in YAML and run on a server with a web UI.

Open source identity and access management server with OpenID Connect, OAuth 2.0 and SAML 2.0 support.

Multithreaded, Redis-compatible key-value database and cache server, a fork of Redis.

Free server control panel for Ubuntu and Debian that manages domains, email mailboxes, FTP users and MySQL databases.

Content management tool that edits Markdown, YAML and JSON files in a codebase, through the local file system or GitHub.

Node.js headless CMS and application framework that generates a GraphQL API and an admin UI from a TypeScript schema.

Envoy-based API gateway and ingress controller for Kubernetes that implements the Kubernetes Gateway API.

Open-source subscription billing and payments platform that a business runs on its own infrastructure and extends through plugins.

File-based PHP content management system that stores content in text files and ships a browser-based admin Panel.

Clojure web framework made of modular libraries, started from a project template.

Consent manager, a JavaScript snippet and config that asks visitors for consent before third-party scripts run.

JavaScript MVVM library that keeps HTML user interfaces in sync with a data model through observables and declarative bindings.

Open-source PHP platform for social publishing, where one or more users post blog posts and status updates to a site they run.

Node.js HTTP middleware framework for building web applications and APIs, with async functions as middleware.

UI toolkit of unstyled, accessible components and primitives for building web apps with SolidJS.

Kotlin framework for building static or full stack websites and web apps on Compose HTML, with an export step that produces static site files.

Privacy-friendly analytics plugin for WordPress that counts pageviews and visitors with optional cookies and no third-party services.

Open-source collection of React components built with Tailwind CSS, Motion and shadcn/ui, installed into a project as source code.

Open source API gateway, built on NGINX, that routes, secures and transforms traffic to APIs through plugins, with a Kong Konnect SaaS option.

Mobile UI components for React, Vue and Svelte, built with Tailwind CSS, with iOS and Material Design themes.

Command-line tool for Docker-based local development environments, with optional deployment of containerized apps to the cloud.

C and Python web application platform for writing scalable, concurrent web processes.

Go API gateway that runs as a single binary, routes and aggregates requests to backend services, and is offered as an open source Community Edition and a commercial Enterprise Edition.

Go framework for building HTTP and gRPC microservices, with application lifecycle, generated transports, middleware and configuration.

Go static site generator that builds Markdown websites for publishing to GitHub Pages through a GitHub Action.

Kotlin framework for building asynchronous servers and HTTP clients, extended with plugins and engines.

Headless UI component library with zero-runtime CSS extraction, used with React.

MVC PHP framework for web and application development, documented in Spanish.

Cloudflare's component library of accessible React UI components for building web applications, built on Base UI.

Symfony-based content management system, distributed as Symfony bundles, with translation and media managers.

Open-source backend server with a pre-built API, realtime notifications and data storage for web, mobile and IoT applications.

Object-oriented web framework for Kotlin/JS with a hierarchy of ready-to-use UI components.