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.

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

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

The personal finance app for everyone

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

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

High performance self-hosted photo and video management solution.

#1 Locally hosted web application that allows you to perform various operations on PDF files

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.

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