Open source

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

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.

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

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

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

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

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

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.

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

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

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

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

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

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

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.

Enterprise-class UI design language and React component library.

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

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

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.

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.

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

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

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

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

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

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.

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

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.

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

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

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.

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

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.

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.

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

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

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.

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

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.

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.

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

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

Unstyled React component library for building accessible user interfaces.

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.

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

Framework-agnostic authentication and authorization framework for TypeScript.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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.

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

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

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

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

JavaScript charting library that draws charts on an HTML5 canvas.

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

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

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

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

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

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.

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

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.

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

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.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Safe, extensible ORM and query builder for Rust.

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

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

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.

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

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

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

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

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

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.

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

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

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.

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.

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.

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

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

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

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

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

UI component library for Vue 3, written in TypeScript.

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

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

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.

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

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.

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

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

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.

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

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

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

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

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

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

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.

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

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.

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

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

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

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.

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

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

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

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

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

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.

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

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.

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

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

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

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.

Go web and RPC framework with code generation from API definitions, built-in resilience components and the goctl command-line 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 ORM library that maps structs to database tables, with associations, hooks, transactions and auto migrations.

Go UI component library of templ components for server-rendered web applications.

Human-friendly HTTP request library for Node.js with promise and stream APIs, retries, timeouts and RFC 7234 caching.

Python package for building web interfaces and demos for machine learning models and Python functions.

Horizontally scalable log aggregation system that indexes log labels rather than the text of log lines.

Open-source e-commerce platform built on ASP.NET Core and MongoDB, with multi-store and multi-vendor support.

Open-source web builder framework that adds a visual editor for HTML templates to an application.

Plugin-based command-line tool that generates typed code from a GraphQL schema and its operations.

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.

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.

Flat-file PHP content management system that stores pages as Markdown and YAML files without a database.

Free and open-source JavaScript table plugin that works with React, Angular, Vue and plain JavaScript.

CSS-in-JS library that defines styles as JavaScript objects and can compile them ahead of time.

JavaScript toolkit that automates build and workflow tasks by composing single-purpose tasks and plugins into streaming pipelines defined in a gulpfile.

PHP HTTP client library for sending HTTP requests and integrating with web services.

HTTP server framework for JavaScript runtimes, built on the Request, Response and Headers primitives of the web platform.

JavaScript templating engine that compiles Handlebars templates into functions that render HTML, text and other output.

Static site generator written in Nim that builds a site from Markdown contents and Mustache templates.

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.

Set of free, MIT-licensed SVG icons for user interface development, with React and Vue packages.

Web control panel for Debian and Ubuntu servers that manages web domains, mail, DNS zones and databases from one dashboard.

Code generator that turns OpenAPI specifications into TypeScript clients, schemas and other generated code, published as @hey-api/openapi-ts.

Open source web server for Unix-like systems, focused on security and a small footprint, with CGI, FastCGI and reverse proxy support.

JavaScript syntax highlighter with automatic language detection that runs in the browser and on Node.js.

Vite-based tool that builds interactive story books of components for Vue, React and Svelte.

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.

JavaScript audio library for the modern web that plays sounds through the Web Audio API with an HTML5 Audio fallback.

Dependency-free browser library that lets HTML attributes make AJAX requests, use CSS transitions, WebSockets and Server-Sent Events.

Scala library for typeful, functional and streaming HTTP servers and clients, built on FS2 and cats-effect.

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.

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.

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.

Wiki compiler that builds wiki pages into a static website, storing page history in a revision control system, with blogging support.

Adapter protocol and client libraries for building single-page React, Vue and Svelte apps on top of server-side routing.

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.

Open-source backend for web and mobile apps with a client-side, real-time database, auth, permissions, storage and streams.

Open source JavaScript UI library of widgets that builds a search interface on Algolia's search API, with React and Vue wrappers.

PHP image processing library for creating, editing and composing images through one API over GD, Imagick or libvips.

Image optimizer that serves images in any size and format from a URL, using sharp for raster images and svgo for SVG.

Open source hosting control panel for managing websites, MySQL databases and cron jobs on Linux servers from a web 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.

Ruby static site generator that turns plain text, Markdown and Liquid templates into websites and blogs.

JavaScript library that simplifies HTML document traversal and manipulation, event handling, animation and Ajax.

Documentation generator that builds HTML API documentation from comments placed in JavaScript source code.

Python static site generator that uses Jinja2 templates and Markdown, with blog and tag index support.

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.

UI toolkit of unstyled, accessible components and primitives for building web apps with SolidJS.

Go framework for building HTTP and gRPC microservices, with application lifecycle, generated transports, middleware and configuration.

Kotlin framework for building asynchronous servers and HTTP clients, extended with plugins and engines.

Cloudflare's component library of accessible React UI components for building web applications, built on Base UI.

Open-source backend server with a pre-built API, realtime notifications and data storage for web, mobile and IoT applications.

Component workshop that runs React component stories in a Vite dev server and builds them into a static app.

Docker Compose setup and CLI that starts a pre-configured local stack of PHP, web server and service containers for PHP projects.

PHP web application framework with routing, an ORM, templating, queues and scheduled jobs.

Vite plugin that configures Vite for use with a Laravel backend server.

JavaScript library for mobile-friendly interactive maps that runs in the browser.

ACME client and library written in Go that obtains, renews and revokes TLS certificates from Let's Encrypt and other ACME servers.

Content management system written in PHP that runs on MySQL or MariaDB and is installed by uploading its package to a web space.

Rust framework for building reactive web applications, client-side or full-stack with server rendering and server functions.

Open-source local PHP development environment for Linux and macOS that runs sites, PHP versions and services as rootless Podman containers.

Backwards-compatible language extension for CSS that compiles Less stylesheets to plain CSS with Node.js or in the browser.

Open-source automated tool that audits web pages and web apps for performance, accessibility, SEO and best practices.

CSS parser, transformer, bundler and minifier written in Rust, usable from JavaScript, Rust or a standalone CLI.

UI framework for building custom elements (web components) with HTML, JavaScript and CSS, maintained by Salesforce.

Open-source survey platform for creating surveys that respondents take through a link or an embed on a website.

Zero-runtime CSS-in-JS library that extracts styles written in JavaScript into CSS files at build time.

JavaScript library for building web components with reactive properties and declarative HTML templates.

Self-hosted ecommerce platform whose Go backend, GoCommerce, serves the API and an admin panel for a separate SvelteKit storefront.

Full-stack framework for Laravel that builds dynamic user interfaces in PHP without a separate JavaScript framework.

React component library for building AI chat and generated-content web apps.

PHP full-text search library that stores its index in SQLite and needs no separate search service.

Config-first web framework that builds business apps and internal tools from YAML configuration, served by a Node.js server.

SQL query builder, Active Record ORM and migrations library for AdonisJS applications.

Open-source set of scalable vector icons, distributed as packages for vanilla JavaScript and for frameworks.

Markdown-based static site generator for blogs and websites, written in Zig.

React component library with hooks and a theming system, installed from npm as @mantine/core and related packages.

JavaScript Markdown parser that follows the CommonMark specification and supports syntax extensions and plugins.

HTML-based language and runtime for building web applications and user interfaces, with the Marko Run application framework.

Virtual CSS language with enhanced syntax that generates styles from class names written in HTML and JavaScript.

Documentation framework on top of MkDocs that builds static documentation sites from Markdown.

React component library that implements Google's Material Design.

Web components for the Material 3 design system, installed from the @material/web npm package.

JavaScript bundler for React Native projects, with a development server and a build API.

PHP microframework built on PSR-15 middleware, in which the application chooses its routing and templating.

Self-hosted content management system for podcasts, blogs, photos, documents and links, running on Cloudflare Workers with D1 and R2 storage.

JVM application framework for Java, Kotlin and Groovy with compile-time dependency injection, AOP and HTTP servers and clients.

Vector database for storing and searching embeddings, run as a Docker or Kubernetes server or as Milvus Lite, a Python library.

Static site generator that builds websites from React JSX components with Vite.

Command-line tool that installs a project's dev tools, sets its environment variables and runs its tasks from one mise.toml file.

Vue 3 component library written in TypeScript, with a theme system configured through JavaScript theme overrides.

Messaging server that routes messages between applications and services by subject, with optional persistence through JetStream.

Open-source content management system and application framework for websites and digital content, built on the Flow PHP framework.

Progressive Node.js framework for building efficient, scalable server-side applications with TypeScript.

Java network application framework for building protocol servers and clients with an asynchronous, event-driven model.

React framework for building full-stack web applications, with routing, rendering and data fetching.

Angular UI component library based on Ant Design.

C-based HTTP web server with reverse proxy, content cache, load balancer and mail proxy features.

Web admin interface for managing Nginx reverse proxy hosts, distributed as a Docker image with free Let's Encrypt certificates.

Dependency-aware command-line build tool and template language that generates websites from HTML, content and data files.

TypeScript server toolkit for full-stack servers with filesystem routing, storage, caching and a Vite plugin, deployable to Node.js, Bun, Deno and serverless hosts.

Browser-based flow editor and Node.js runtime for building event-driven applications that connect devices, services and data.

Self-hostable HTTP publish-subscribe server that delivers published messages as push notifications to phones, desktops and browsers.

Vue-based framework for building server-rendered, static and hybrid websites and web apps.

File-based content module for Nuxt that queries Markdown, YAML, CSV and JSON files from a Vue application.

Vue component library built on Reka UI and Tailwind CSS, used as a Nuxt module or as a Vite plugin in plain Vue apps.

POSIX shell script that installs and switches between multiple Node.js versions for one user.

Monorepo task runner and build system for TypeScript and polyglot codebases, with caching and affected-only runs.

Go reverse proxy that adds OAuth 2.0 and OpenID Connect authentication in front of web applications.

OCaml framework for building client and server web and mobile applications as a single program.

Set of SVG icons built by GitHub, with helper packages for JavaScript, React and Ruby.

Open source web analytics framework that records visits to websites and applications and reports on them, with a JavaScript tracker and a PHP server.

Open source ecommerce platform written in PHP for running an online store on a web server.

Open-source usage metering and billing platform that ingests usage events and bills customers for the usage.

Search library for full-text, vector and hybrid search that runs in the browser, on a server or at the edge.

Static search library that builds a search index from built HTML at build time and serves search from static files.

Styling engine that generates atomic CSS at build time from type-safe TypeScript style definitions.

Haskell library and command-line tool that converts documents between markup formats.

Open source backend for web and mobile apps that runs on Node.js, stores data in MongoDB or PostgreSQL, and can be mounted on an Express app.

TypeScript framework that runs inside a Next.js app and generates an admin panel, database schema and REST, GraphQL and local APIs from one config, used as a headless CMS or application backend.

Testing framework for PHP that is built on PHPUnit and adds an expressive syntax for writing tests.

Open-source administration and development tool for PostgreSQL, run as a desktop application or as a web application.

Embeddable WebAssembly build of PostgreSQL, packaged as a TypeScript and JavaScript library for the browser, Node.js, Bun and Deno.

Full-stack PHP web framework delivered as a PHP extension.

Open-source icon family of SVG icons in six weights, with packages for the web, React, Vue and other frameworks.

FastCGI process manager for PHP, built as an optional SAPI in the PHP source tree.

Unit testing framework for PHP, installed with Composer and run from the command line.

Java and Scala web framework whose production build is a distribution that runs as a server process, with Twirl templates.

Design environment that renders JSX from a team's own component library across themes and screen sizes.

Browser automation and end-to-end test framework that drives Chromium, Firefox and WebKit through one API.

Open-source Go backend shipped as a single executable, with an embedded SQLite database, realtime subscriptions, authentication and a dashboard.

Open source website analytics tool that uses no cookies, offered as a managed service on poeticmetric.com or self-hosted with Docker Compose.

Book-publishing system written in Racket that embeds code in text documents for multiple-output publishing.

Design system of Web Components with npm wrapper packages for React, Angular, Vue and vanilla JavaScript, published by Porsche AG.

Tool for transforming CSS with JavaScript plugins.

Standalone web server that serves a RESTful API directly from a PostgreSQL database schema.

JavaScript library for building component-based user interfaces on a virtual DOM, with a React-compatible API through an optional alias.

Python workflow orchestration framework that runs flows on schedules, events or API calls, with a self-hostable server.

Opinionated code formatter for JavaScript and many other languages that rewrites source to a consistent style.

TypeScript and Node.js object-relational mapper that generates a type-safe database client from a schema file.

Desktop CMS for Windows, macOS and Linux that builds static websites on the author's computer.

Open-source visual editor library for React that lets users build drag-and-drop pages from the components an app defines.

Symfony-based content management system for websites, with Markdown or database content and an optional static export.

Shell-based version manager that switches between multiple installed Python versions.

Java framework for building cloud-native applications that run on the JVM or as native executables.

Vue.js framework with UI components and a CLI that builds single-page, server-rendered, static, PWA, mobile, desktop and browser extension apps.

Framework for web apps that resumes on the client instead of hydrating, with Qwik City for routing and server rendering.

Web application environment for Common Lisp, for personal websites and deployable applications.

Set of 15×15 icons that ships as individual React components on npm.

Unstyled, accessible React component primitives for building design systems and web apps.

Pre-styled, open-source component library designed to work out of the box with minimal configuration.

JavaScript library for building component-based user interfaces for the web, with react-dom for browsers and server rendering.

Unstyled, accessible React components and hooks from Adobe for building custom UI, published as react-aria-components.

Bootstrap components rebuilt as React components, installed from npm alongside the Bootstrap stylesheet.

Sandbox for developing and testing React UI components in isolation, with file-based fixtures, a playground interface and a static export.

Implementation of React Native's components and APIs for the web, rendering through React DOM.

Router for React whose framework mode adds server rendering, static pre-rendering and data loading for building full-stack web apps.

React component library implementing Adobe's Spectrum design system, with accessible and adaptive components.

React component library of UI components, published as the rsuite npm package.

Distributed key/value store, an independent LGPL-licensed fork of Redis.

In-memory data store used as a cache, database and streaming engine, offered under source-available and open-source licenses.

Full-stack web framework built on Web APIs that combines routing, data, UI and asset compilation in one stack.

Open-source HTML presentation framework for building slide decks that run in a web browser.

Async web framework for Rust with typed routes, request guards and built-in form and JSON handling.

JavaScript and TypeScript bundler written in Rust with a Rollup-compatible API, designed as the bundler of Vite.

JavaScript module bundler that compiles ES module source into bundles for browsers, Node.js and other platforms.

Build tool for modern web applications that runs on Rspack and supports React, Vue, Svelte and other frameworks.

Fast Rust-based bundler for the web with a modernized webpack API.

Static site generator built on Rsbuild that turns Markdown and MDX files into documentation websites.

Ruby web application framework with an ORM, routing, ERB views, background jobs and built-in deployment tooling.

S3-compatible distributed object storage server written in Rust.

Java server that speaks the S3 API and forwards requests to other object storage backends, such as AWS S3, Azure Blob Storage, Google Cloud Storage, the local filesystem and SFTP.

Asynchronous Python web framework with its own production-ready web server.

React component library and design system from Sanity, with layout primitives and theme tokens for building accessible web apps.

Open-source API reference renderer that turns OpenAPI and AsyncAPI documents into interactive API documentation.

Drupal module that provides a framework for creating searches on Drupal entities, backed by a search server or Drupal's own database.

Design system from Daangn that delivers one set of design tokens to React, Lynx and CSS packages.

React component library and design system from the Douyin front-end team, with themes built on design tokens.

Svelte port of shadcn/ui, with components that a CLI copies into a project's source code.

Go and templ components whose source code is added to a project with a CLI, so the project can customize it.

Vue components whose source code is added to a project with a CLI, so the project can customize it.

Composable React components whose source code is added to a project with a CLI, so the project can customize it.

Node.js module that resizes and converts JPEG, PNG, WebP, AVIF and other image formats, using the libvips image library.

Syntax highlighter for JavaScript runtimes that colors code with the TextMate grammars used by VS Code.

Open-source design system of web components for industrial software interfaces, with packages for React, Vue and Angular.

Icon set of SVG logos for popular brands, published as an npm and Composer package.

Ruby DSL for building web applications with a small set of route definitions, run on a Rack server.

Svelte component package of the Skeleton design system, which is built on Tailwind CSS.

Markdown-based slides maker and presenter that builds slide decks as web pages with Vue and Vite.

Library that enables low-latency, bidirectional and event-based communication between a client and a server.

Self-hosted realtime server written in Rust that serves Pusher-compatible WebSocket and HTTP APIs.

Full-stack application framework for Solid, built on Vite.

Schema-less search backend server written in Rust that indexes words against identifiers.

Accessible UI primitives for Angular, with the behavior installed from npm and the styled components copied into the project.

Web components implementing Adobe's Spectrum design system, open source and usable with any web framework or none.

Publishing system for the Internet, written in PHP, for multilingual websites with collaborative editing.

Java framework for building stand-alone Spring applications with an embedded web server and auto-configuration.

Comprehensive programming and configuration model for Java-based enterprise applications, on any deployment platform.

Public-domain C library that implements a self-contained SQL database engine in a single file.

Lightweight ASGI framework and toolkit for building async web services in Python.

Documentation theme and integration for the Astro framework that builds documentation websites from Markdown, Markdoc and MDX.

Toolchain that compiles TypeScript components into web components, distributable as custom elements, framework wrappers or prerendered websites.

Static site and blog generator written in OCaml that compiles XML documents, with Markdown sources through a plugin.

Python framework that turns scripts into interactive web apps for data work.

Build system that exports design tokens defined once in JSON or JavaScript to platform formats such as CSS, iOS, Android and JavaScript.

Styling library for React that writes component styles as CSS in tagged template literals.

Babel plugin and runtime that transpile CSS written in style tags inside JSX components into class names scoped to that component.

CSS linter that reports errors and enforces conventions in stylesheets, with rules, plugins and shareable configs.

JavaScript styling library whose build-time compiler turns style definitions into atomic CSS class names.

Svelte component library of form controls, popups, notifications and other UI elements, published as @svar-ui/svelte-core.

Compiler that turns Svelte components into JavaScript that updates the DOM directly, used to build web applications.

Svelte-based framework for building web applications with server rendering, prerendering and client-side rendering.

Git-based headless CMS, a single-page admin interface for editing content stored in a Git repository of a static site.

Node.js library and command-line application that optimizes SVG files by removing redundant information, with a browser bundle and a webpack loader.

Open source webhook service that sends webhooks with retries, signatures and a customer-facing portal, self-hosted or as a hosted service.

Rust-based platform that compiles, bundles and minifies JavaScript and TypeScript, with npm packages for its JavaScript APIs.

Coroutine-based PHP extension for concurrent networking and TCP, UDP, Unix socket, HTTP and WebSocket servers.

PHP full-stack web framework built from a set of reusable, standalone components.

Symfony component that maps asset directories to versioned public files and loads JavaScript through browser importmaps, without a bundler.

Utility-first CSS framework that generates styles from class names used in HTML and other templates.

First-class variant API for Tailwind CSS that defines typed component recipes with variants, slots and compound styles.

Utility function that merges Tailwind CSS classes in JavaScript so that conflicting classes resolve without style conflicts.

Suite of more than 80 Blade components for TALL Stack applications built with Laravel, Livewire, Alpine.js and Tailwind CSS.

Universal styling and UI component library for React and React Native, with an optimizing compiler for web and native.

Asynchronous state management and data-fetching library that caches, updates and synchronizes server state in web applications.

Full-stack framework for React and Solid, powered by TanStack Router, for server-rendered, static and client-only web apps.

React component library for the TDesign design system, published as the tdesign-react npm package.

Open-source durable execution platform whose server runs workflows and retries failed steps, self-hosted or as Temporal Cloud.

JavaScript minifier and compressor for ES6+ code, used from the command line or through the Node.js API.

Open-source e-commerce CMS and framework built on Symfony for online stores and web content.

Open-source distributed SQL database, MySQL compatible, that supports hybrid transactional and analytical workloads.

Express-like web framework for Node.js, written in TypeScript and published as native ESM.

Drupal module that generates static HTML from a Drupal site and keeps its content as files.

Rust framework that renders full-stack web apps as HTML on the server, with client reactivity compiled from the same Rust code.

Python web framework and asynchronous networking library that runs its own HTTP server rather than WSGI.

Cloud-native application proxy and reverse proxy that discovers routes from container, orchestrator and file providers.

Self-hosted web analytics that runs on Cloudflare Workers, Durable Objects, D1 and R2 in the site owner's own Cloudflare account.

Open-source platform for building durable AI agents and background tasks in TypeScript, offered as a cloud service and for self-hosting.

Bundler for TypeScript and JavaScript libraries that emits ESM, CJS, IIFE or UMD bundles and declaration files, built on Rolldown.

JavaScript framework from Hotwire that updates server-rendered web applications by sending HTML over the wire.

Incremental bundler for JavaScript and TypeScript, written in Rust, that ships inside Next.js.

Build system written in Rust that runs the package.json scripts of JavaScript and TypeScript monorepos with caching and parallel execution.

Embedded SQL database engine written in Rust that is compatible with SQLite, with a hosted service beside it.

Compiler that turns Tailwind-style utility classes into CSS at runtime in the browser or in JavaScript environments, without a build step.

Python framework for semantic search, LLM pipelines and workflows, with an embeddings database, a web API and Docker images.

Documentation generator that builds HTML or JSON API documentation from the comments of TypeScript projects.

Programming language that adds static types to JavaScript, with a compiler (tsc) that converts its code to JavaScript.

Open-source search server with an HTTP API that indexes collections of documents for instant search, self-hosted or as Typesense Cloud.

JavaScript adapter that connects InstantSearch.js and its React, Vue and Angular bindings to a Typesense search server.

Public domain library of user interface components, CSS, JavaScript and a visual style guide designed for U.S. federal government websites.

JavaScript fuzzy search library that matches a short search phrase against a list of phrases without building an index.

Micro HTML and SVG renderer for building reactive web pages with template literals.

Open-source web and product analytics platform, self-hosted or offered as Umami Cloud.

JavaScript and CSS library that makes links, forms and server-rendered HTML pages update fragments without a full page load.

Go package that validates struct and field values using struct tags.

BSD-licensed in-memory key-value datastore for caching, message queues and primary database use, forked from Redis.

Build-time CSS tool that lets styles be written in TypeScript, with locally scoped class names and CSS variables.

Vue component library for mobile web apps, written in TypeScript.

Server-side Swift HTTP web framework for building backends, web apps, APIs and HTTP servers.

Content layer library that turns Markdown, MDX, YAML and JSON files into typed data for a JavaScript or TypeScript application.

Open-source headless commerce framework built on Node.js and TypeScript, with a GraphQL API.

Command-line interface of the Vercel hosting platform, used to deploy projects, run them locally and manage them from a terminal.

React component library and design system from monday.com, with styles, tokens and guidelines for application development.

JavaScript toolkit for composing full stack applications and frameworks from Vite and Nitro primitives.

Caching HTTP reverse proxy, installed in front of any HTTP server to cache its responses, configured with the Vinyl Configuration Language (VCL).

Frontend build tool and dev server for web applications, with a development server and a production bundler.

Static site generator built on Vite and Vue that turns Markdown content into content-centric websites.

Cloud-native, horizontally scalable distributed database system built around MySQL.

Testing framework for JavaScript and TypeScript projects, built on Vite.

Documentation framework that builds Markdown and MDX sources into docs sites, powered by Vite.

JavaScript framework for building user interfaces on the web, with a reactive rendering system and optional server rendering.

Language tooling for Vue single-file components, with the Vue (Official) VS Code extension, a language server and the vue-tsc type checker.

Open source UI component framework for Vue, distributed as the vuetify npm package.

Headless Vue components and composables with no styling, distributed as the @vuetify/v0 npm package.

Command-line tool that builds Rust crates into WebAssembly packages for JavaScript, with npm publishing support.

Command-line toolkit that builds websites and web apps from XML with XSLT stylesheets.

Web-based administration tool for Unix-like servers that configures system files and server applications such as Apache HTTP Server, BIND and MySQL.

ASP.NET Core middleware that bundles and minifies CSS and JavaScript files at runtime and keeps the output in memory.

JavaScript module bundler that packs application modules and assets into optimized output for browsers and other runtimes.

Open-source PHP content management system for websites and blogs, with a block editor, themes and plugins.

Asynchronous, event-driven PHP framework for building network servers that handle HTTP, WebSocket and custom socket protocols.

Free distribution of Apache, MariaDB, PHP and Perl for setting up a local development server on Windows, Linux and macOS.

Open-source platform for running many PostgreSQL instances on Kubernetes, with copy-on-write branching and scale-to-zero.

React component library with a design system of accessible components, styling and theming.

Rust framework for building client-side web applications that run as WebAssembly in the browser.

Static site generator written in Go that renders Markdown and HTML pages through a shared layout.

Sync engine that keeps a client-side datastore of a web app in step with a Postgres database.

TypeScript-first schema validation library that validates data and infers static types from the same schemas.

Static site generator distributed as a single binary, with the Tera template engine, Sass compilation and search built in.

Static site generator written in Go that builds Markdown and HTML files into a site, with plugins, hooks and routes.