Master programming by recreating your favorite technologies from scratch.

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

😎 Awesome lists about all kinds of interesting topics

A collective list of free APIs

📚 Freely available programming books

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

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

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

A list of Free Software network services and web applications which can be hosted on your own servers

Curated list of project-based tutorials

All Algorithms implemented in Python

Linux kernel source tree

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

A collection of inspiring lists, manuals, cheatsheets, blogs, hacks, one-liners, cli/web tools and more.

📝 Algorithms and data structures implemented in JavaScript with explanations and links to further readings

An Open Source Machine Learning Framework for Everyone

A book series (2 published editions) on the JS language.

📚 技术面试必备基础知识、Leetcode、计算机操作系统、计算机网络、系统设计

Visual Studio Code

Flutter makes it easy and fast to build beautiful apps for mobile and beyond

The most popular HTML, CSS, and JavaScript framework for developing responsive, mobile first projects on the web.

Fair-code workflow automation platform with native AI capabilities. Combine visual building with custom code, self-host or cloud, 400+ integrations.

A curated list of awesome Go frameworks, libraries and software

Master the command line, in one page

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

🤗 Transformers: the model-definition framework for state-of-the-art machine learning models in text, vision, audio, and multimodal models, for both inference and training.

JavaScript Style Guide

Langflow is a powerful tool for building and deploying AI-powered agents and workflows.

Share, discover, and collect prompts from the community. Free and open source — self-host for your organization with complete privacy.

Command-line program to download videos from YouTube.com and other video sites