Master programming by recreating your favorite technologies from scratch.

21 Lessons, Get Started Building with Generative AI

🤯 Lobe Chat - an open-source, modern design AI chat framework. Supports multiple AI providers (OpenAI / Claude 4 / Gemini / DeepSeek / Ollama / Qwen), Knowledge Base (file upload / RAG ), one click install MCP Marketplace and Artifacts / Thinking. One-click FREE deployment of your private AI Agent application.

Curated list of project-based tutorials

Learn how to design large-scale systems. Prep for the system design interview. Includes Anki flashcards.

A collective list of free APIs

Production-ready platform for agentic workflow development.

《Hello 算法》：动画图解、一键运行的数据结构与算法教程。支持 Python, Java, C++, C, C#, JS, Go, Swift, Rust, Ruby, Kotlin, TS, Dart 代码。简体版和繁体版同步更新，English version in translation

📚 Freely available programming books

Interactive roadmaps, guides and other educational content to help developers grow in their careers.

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

Collection of awesome LLM apps with AI Agents and RAG using OpenAI, Anthropic, Gemini and opensource models.

A complete computer science study plan to become a software engineer.

An open source payments switch written in Rust to make payments fast, reliable and affordable

The personal finance app for everyone

Get up and running with OpenAI gpt-oss, DeepSeek-R1, Gemma 3 and other models.

High performance self-hosted photo and video management solution.

🎓 Path to a free self-taught education in Computer Science!

A curated list of free courses with certifications. Also available at https://free-certifications.com/

The first real AI developer

A feature-rich command-line audio/video downloader

Course to get into Large Language Models (LLMs) with roadmaps and Colab notebooks.

Fabric is an open-source framework for augmenting humans using AI. It provides a modular system for solving specific problems using a crowdsourced set of AI prompts that can be used anywhere.

Focus on prompting and generating

利用AI大模型，一键生成高清短视频 Generate short videos with one click using AI LLM.