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

An open agent platform that runs on your machine and works from the chat apps you already use

Skills for Real Engineers. Straight from my .agents directory.

DeepSeek Harness: Everything is a Plugin.

The library for web and native user interfaces.

The open source coding agent.

Fair-code workflow automation platform with native AI capabilities. Combine visual building with custom code, self-host or cloud, 400+ integrations.

Algorithms and data structures implemented in JavaScript with explanations and links to further readings

Visual Studio Code

A book series on JavaScript

The most popular HTML, CSS, and JavaScript framework for developing responsive, mobile first projects on the web.

JavaScript Style Guide

The React Framework

Curated coding interview preparation materials for busy software engineers

Virtual whiteboard for sketching hand-drawn like diagrams

Coding articles to level up your development skills

Composable, accessible components with thoughtful defaults. Build your own component library with code you can customize, extend, and make your own.

A framework for building native applications using React

Build cross-platform desktop apps with JavaScript, HTML, and CSS

Node.js JavaScript runtime

AI agent toolkit: unified LLM API, agent loop, TUI, coding agent CLI

High performance self-hosted photo and video management solution.

JavaScript 3D Library.

Production-grade engineering skills for AI coding agents.

The open source Firebase alternative

Bring data to life with SVG, Canvas and HTML.

The open-source app everyone uses to manage agents at work

Build smaller, faster, and more secure desktop and mobile applications with a web frontend.

A superset of JavaScript that compiles to clean JavaScript output.

Papers from the computer science community to read and discuss.