Top Repositories

A comprehensive collection of step-by-step tutorials for rebuilding popular technologies from scratch. Covers databases, operating systems, programming languages, web servers, AI models, and more across multiple languages. Perfect for developers seeking to deeply understand core tech principles through hands-on implementation.

A curated list of awesome lists covering all kinds of interesting topics. This meta-list serves as the central directory for discovering high-quality resources on programming languages, frameworks, tools, and various technology domains.

The world's largest free coding education platform. Offers a self-paced full-stack web development and machine learning curriculum with interactive coding challenges, certifications across responsive web design, JavaScript, Python, databases, and APIs, plus developer language certifications. Built on React, Fastify, and Gatsby, with a vibrant open-source community that has helped over 100,000 people land their first developer job.

A collectively curated list of free public APIs for software and web development. This extensive repository contains thousands of APIs across 100+ categories including animals, finance, health, music, news, science, sports, weather, and more. Maintained by the community and APILayer team.

A collaborative, multilingual collection of freely available programming books, courses, podcasts, and interactive tutorials. Maintained by the Free Ebook Foundation, it indexes thousands of learning resources across numerous programming languages and computer science topics.

OpenClaw is a self-hosted personal AI assistant that connects to WhatsApp, Telegram, Discord, iMessage and 20+ channels. Features voice wake, live canvas, browser automation, and runs on any OS with local-first privacy.

Community-driven interactive roadmaps, guides, and resources for developers. Covers frontend, backend, DevOps, AI, and more with clickable nodes for detailed learning paths and best practices.

Learn how to design large-scale systems. Prep for the system design interview. An organized collection of resources covering scalability, performance, availability, and common system design patterns with solutions and Anki flashcards.

A comprehensive multi-month self-study plan for software engineering interviews at top tech companies. Covers data structures, algorithms, Big-O, graphs, dynamic programming, system design, and more, with curated video courses, book recommendations, coding practice platforms, and flashcard strategies.

A curated list of awesome Python frameworks, libraries, software and resources. Covers web frameworks, data analysis, machine learning, testing, and more.

A comprehensive list of Free Software network services and web applications that can be hosted on your own server(s). Covers analytics, communication, file management, media streaming, productivity tools, and 50+ categories with 1000+ self-hostable alternatives to SaaS providers.

996.ICU is an open-source initiative protesting the '996' work culture (9am-9pm, 6 days/week) in Chinese tech companies, advocating for labor law compliance and workers' rights, and introducing the 'Anti-996 License' to restrict non-compliant companies from using licensed code.

A curated list of programming tutorials where developers learn to build applications from scratch. Organized by primary programming languages, covering topics like compilers, operating systems, databases, and web apps through hands-on projects.

React is a JavaScript library for building user interfaces. It enables developers to create interactive UIs with declarative, component-based architecture. React can render on the server and power mobile apps via React Native.

Linux kernel source tree

An agentic skills framework and development methodology for AI coding agents. Provides 14 composable skills that auto-trigger across the full dev lifecycle—brainstorming, planning, TDD, subagent-driven execution, code review, and branch management. Works with Claude Code, Codex, Gemini CLI, Cursor, OpenCode, GitHub Copilot, and more.

A curated knowledge base for sysadmins, DevOps, and security pros — packed with CLI/GUI/web tools, pentesting & hacking resources, shell one-liners, cheat sheets, inspiring lists, and hardening guides, all organized in one place.

A comprehensive collection of algorithms implemented in Python for educational purposes. Covers sorting, searching, data structures, machine learning, cryptography, and more to help developers learn and understand algorithmic concepts.

A cross-harness AI coding agent optimization system with 60 specialized agents, 232 skills, automated hooks, security scanning, continuous learning, and memory persistence. Works across Claude Code, Codex, Cursor, OpenCode, Copilot and more, covering 12+ language ecosystems for production-ready agentic development.