Dev only

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

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

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

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

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.

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

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

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

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.

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

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

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

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

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.

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

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

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.

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

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

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

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

Content management tool that edits Markdown, YAML and JSON files in a codebase, through the local file system or GitHub.

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.

Desktop app for macOS and Windows that runs local PHP and Laravel sites on their own domains, with PHP versions and local services managed from one window.

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

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.

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

Free desktop application for developing WordPress sites on the developer's own computer.

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

Local web server environment for macOS and Windows with Apache or Nginx, PHP and MySQL, and MAMP PRO, a commercial app for running several local sites.

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

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

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

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

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.

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.

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.

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

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.

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

Tool for transforming CSS with JavaScript plugins.

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

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

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

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

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.

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

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

Open-core PDF editing and processing platform for self-hosted servers and a hosted service, with a REST API.

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

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

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

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

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

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

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.

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

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.

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.

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

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

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

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

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

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

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

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

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