Master programming by recreating your favorite technologies from scratch.

🤯 Lobe Chat - an open-source, modern-design AI chat framework. Supports Multi AI Providers( OpenAI / Claude 3 / Gemini / Ollama / DeepSeek / Qwen), Knowledge Base (file upload / knowledge management / RAG ), Multi-Modals (Plugins/Artifacts) and Thinking. One-click FREE deployment of your private ChatGPT/ Claude / DeepSeek application.

Dify is an open-source LLM app development platform. Dify's intuitive interface combines AI workflow, RAG pipeline, agent capabilities, model management, observability features and more, letting you quickly go from prototype to production.

Curated list of project-based tutorials

📚 Freely available programming books

21 Lessons, Get Started Building with Generative AI 🔗 https://microsoft.github.io/generative-ai-for-beginners/

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

Get up and running with Llama 3.3, DeepSeek-R1, Phi-4, Gemma 3, Mistral Small 3.1 and other large language 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

《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 ongoing

freeCodeCamp.org's open-source codebase and curriculum. Learn to code for free.

RAGFlow is an open-source RAG (Retrieval-Augmented Generation) engine based on deep document understanding.

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

real time face swap and one-click video deepfake with only a single image

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

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

A collective list of free APIs

🔥 Turn entire websites into LLM-ready markdown or structured data. Scrape, crawl and extract with a single API.

🚀🤖 Crawl4AI: Open-source LLM Friendly Web Crawler & Scraper. Don't be shy, join here: https://discord.gg/jP8KfhDhyN

A feature-rich command-line audio/video downloader

The OS for your personal finances

Your AI second brain. Self-hostable. Get answers from the web or your docs. Build custom agents, schedule automations, do deep research. Turn any online or local LLM into your personal, autonomous AI (gpt, claude, gemini, llama, qwen, mistral). Get started - free.

🙌 OpenHands: Code Less, Make More

An open-source RAG-based tool for chatting with your documents.