Open-source codebase for the world's famous free coding platform, offering complete curricula from beginner to full-stack development.

A comprehensive guide to system design, helping you ace big tech interviews with included flashcards.

This is the core source code of the Linux operating system, acting as the computer's brain to manage hardware and resources. It is suitable for those who want to deeply understand or modify the system layer.

A comprehensive Java interview and backend development guide covering basics, architecture, and AI apps to help you ace interviews and get promoted.

An open-source project collecting useful code snippets and programming articles to help you quickly solve development issues and improve skills.

A toolkit of specialized AI agent configurations that transform tools like Claude and Cursor into domain experts like frontend developers or backend architects, saving you from creating custom prompts repeatedly.

A 'long-term memory' plugin for Claude Code that records your coding history and syncs context automatically, saying goodbye to repetitive explanations.

An open-source project simulating an AI hedge fund, featuring AI avatars of 19 investment masters like Buffett to analyze stocks and make decisions, for learning and entertainment only.

An open-source all-in-one backend platform that handles user login, databases, and file storage for you, so you don't need to build servers from scratch.

An open-source framework using AI multi-agents to simulate real trading teams, helping you analyze and execute financial trading strategies with LLMs.

A tool that turns your Claude AI assistant into a team of collaborating agents that automatically divide tasks, share memories, and work together.

A local-first code analysis tool that turns your project files into an interactive relationship graph, helping you quickly understand code structure and dependencies without sending data to the cloud.

Alibaba's open-source platform for microservices and AI apps, solving service discovery and config update issues to make systems stable and efficient.

This tool lets AI assistants instantly understand your entire project files, turning code, docs, and even videos into a queryable knowledge graph to help you grasp the architecture fast.

It's the networking and security manager for Kubernetes clusters, using eBPF to make container communication faster and safer, with clear traffic visibility, essential for DevOps.

radare2 is a professional command-line reverse engineering tool that helps you deeply analyze software, viruses, and binary files, essential for security researchers and hackers.

A browser-based 3D architectural design tool that lets you easily build houses, create structures, and share your projects.

This tool enables AI coding assistants (like Claude Code) to understand your entire codebase via semantic search, pinpointing relevant code without feeding the whole project to AI, saving money and boosting efficiency.

A high-performance computing library for NVIDIA GPUs that significantly accelerates large model training and inference, boosting underlying code efficiency.

Just enter a topic, and it automatically writes scripts, adds images, voiceovers, and synthesizes short videos, making video creation easy for beginners.