Top Repositories

A curated collection of step-by-step guides to rebuild your favorite technologies from scratch — databases, operating systems, compilers, neural networks, game engines, Docker, Git, blockchain, and more. Master programming through hands-on creation across 30+ domains with tutorials in C, Python, Rust, Go, JavaScript, and many other languages.

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.

A community-curated directory of 2,000+ free public APIs across 50+ categories—finance, weather, AI, sports and more—with auth, HTTPS and CORS info for each. The go-to reference for finding the right API for your app or prototype.

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.

REA is a CLI and MCP server that lets AI agents reverse engineer anything from app behavior down to native binaries. It connects agents to tools like Hopper, Ghidra, and IDA to decompile native binaries, map JavaScript/Electron apps, inspect .NET assemblies, Android APKs, firmware, and websites—all locally with verifiable evidence, so you can understand how a feature works and rebuild it in your own stack.

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.

A comprehensive, open-source guide to mastering large-scale system design. Covers scalability, CAP theorem, databases, caching, load balancing, and more, with real-world architectures, interview questions with solutions, and Anki flashcards for effective spaced-repetition learning.

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.

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 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.

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

A curated collection of agent skills for real engineering work — not vibe coding. Fixes the 4 biggest AI coding failure modes: misalignment (/grill-me), verbosity (shared language), broken code (/tdd), and architecture rot (/improve-codebase-architecture). Small, composable, model-agnostic, and battle-tested from decades of engineering experience.

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 harness-native agent operating system for AI coding tools. 67+ specialized agents, 279+ skills, automated hooks, continuous learning, and security scanning (AgentShield) — production-ready workflows across Claude Code, Codex, Cursor, OpenCode, Gemini, and more.

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.

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.

DeepSeek Harness: Everything is a Plugin.

A self-improving AI agent by Nous Research with a built-in learning loop — it creates skills from experience, autonomously improves them during use, and deepens a user model across sessions. Connect via CLI, Telegram, Discord, Slack, WhatsApp, or Signal. Supports 300+ models (OpenAI, Anthropic, Gemini, etc.), 40+ tools, cron scheduling, subagent delegation, and runs anywhere from a $5 VPS to serverless GPU clusters.