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freeCodeCamp.org's open-source codebase and curriculum. Learn math, programming, and computer science for free.

The world's most flexible commerce platform for agents and developers

Bitwarden client apps (web, browser extension, desktop, and cli).

The Pants Build System

A pure JavaScript implementation of git for node and browsers!

:hedgehog: PostHog is the leading platform for building self-driving products. Our developer tools – AI observability, analytics, session replay, flags, experiments, error tracking, logs, and more – capture all the context agents need to diagnose problems, uncover opportunities, and ship fixes. Steer it all from Slack, web, desktop, or the MCP.

The batteries-included full-stack framework for the AI era. Develop JS/TS web apps (React, Node.js, and Prisma) using declarative code that abstracts away complex full-stack features like auth, background jobs, RPC, email sending, end-to-end type safety, single-command deployment, and more.

A modern load testing tool, using Go and JavaScript

⚡ Write Native with TypeScript ✨ Best of all worlds (TypeScript, Swift, Objective C, Kotlin, Java, Dart). Use what you love ❤️ Angular, React, Solid, Svelte, Vue with: iOS (UIKit, SwiftUI), Android (View, Jetpack Compose), Flutter and you name it compatible.

Platform to build admin panels, internal tools, and dashboards. Integrates with 25+ databases and any API.

Node.js JavaScript runtime ✨🐢🚀✨

Making mozilla.org awesome, one pebble at a time

Interactive, thoroughly customizable maps in the browser, powered by vector tiles and WebGL

Boa is an embeddable Javascript engine written in Rust.

Test suites for Web platform specs — including WHATWG, W3C, and others