Best Open Source free Libraries

A curated list of the most popular GitHub repositories tagged with free. Select any project to visualize its architecture and dive into the codebase using RepoMind's AI engine.

#1codecrafters-io/build-your-own-x

Master programming by recreating your favorite technologies from scratch.

478,998Markdown

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#2public-apis/public-apis

A collective list of free APIs

411,384Python

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#3DigitalPlatDev/FreeDomain

DigitalPlat FreeDomain: Free Domain For Everyone

152,818HTML

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#4justjavac/free-programming-books-zh_CN

:books: 免费的计算机编程类中文书籍，欢迎投稿

116,465

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#5cloudcommunity/Free-Certifications

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

52,700

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#6RocketChat/Rocket.Chat

The Secure CommsOS™ for mission-critical operations

44,924TypeScript

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#7DataTalksClub/data-engineering-zoomcamp

Data Engineering Zoomcamp is a free 9-week course on building production-ready data pipelines. The next cohort starts in January 2026. Join the course here 👇🏼

39,140Jupyter Notebook

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#8luong-komorebi/Awesome-Linux-Software

🐧 A list of awesome Linux softwares

24,964HTML

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#9zulip/zulip

Zulip server and web application. Open-source team chat that helps teams stay productive and focused.

24,874Python

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#10is-a-dev/register

Grab your own sweet-looking '.is-a.dev' subdomain.

9,994JavaScript

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#11StartBootstrap/startbootstrap-sb-admin-2

A free, open source, Bootstrap admin theme created by Start Bootstrap

9,879HTML

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#12webstudio-is/webstudio

Open source website builder and Webflow alternative. Webstudio is an advanced visual builder that connects to any headless CMS, supports all CSS properties, and can be hosted anywhere, including with us.

9,057TypeScript

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#13pterodactyl/panel

Pterodactyl® is a free, open-source game server management panel built with PHP, React, and Go. Designed with security in mind, Pterodactyl runs all game servers in isolated Docker containers while exposing a beautiful and intuitive UI to end users.

8,701PHP

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#14cugu/awesome-forensics

⭐️ A curated list of awesome forensic analysis tools and resources

4,953

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#15awesome-vpn/awesome-vpn

Free proxy,VPN,免费代理,网络加速,科学上网,机场订阅,翻墙,梯子無料プロキシ 무료 프록시 Gratis gratuit Бесплатный прокси gratuito Gratis Darmowe Ücretsiz بروكسي مجاني मुफ्त प्रॉक्सी พร็อกซีฟรี miễn phí

4,922

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