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.
#2public-apis/public-apis
A collective list of free APIs
#3DigitalPlatDev/FreeDomain
DigitalPlat FreeDomain: Free Domain For Everyone
#4justjavac/free-programming-books-zh_CN
:books: 免费的计算机编程类中文书籍，欢迎投稿
#5cloudcommunity/Free-Certifications
A curated list of free courses with certifications. Also available at https://free-certifications.com/
#6RocketChat/Rocket.Chat
The Secure CommsOS™ for mission-critical operations
#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 👇🏼
#8luong-komorebi/Awesome-Linux-Software
🐧 A list of awesome Linux softwares
#9zulip/zulip
Zulip server and web application. Open-source team chat that helps teams stay productive and focused.
#10is-a-dev/register
Grab your own sweet-looking '.is-a.dev' subdomain.
#11StartBootstrap/startbootstrap-sb-admin-2
A free, open source, Bootstrap admin theme created by Start Bootstrap
#12pterodactyl/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.
#13dreamhunter2333/cloudflare_temp_email
CloudFlare free temp domain email 免费收发 临时域名邮箱 支持附件 IMAP SMTP TelegramBot
#14justlovemaki/AIClient-2-API
Simulates Gemini CLI, Antigravity, Codex, Grok, and Kiro client requests, compatible with the OpenAI API. It supports thousands of Gemini model requests per day and offers free use of the built-in Claude model in Kiro. Easily connect to any client via the API, making AI development more efficient!
#15wesnoth/wesnoth
An open source, turn-based strategy game with a high fantasy theme.
#16a597873885/webfunny_monitor
【免费社区版】【企业版】Webfunny是一款集全链路监控和埋点系统于一体的大数据分析系统，我们致力于解决线上的疑难杂症和精细化分析业务数据；监控系统面向技术、埋点系统面向业务，两者配合使用，相得益彰。
#17cugu/awesome-forensics
⭐️ A curated list of awesome forensic analysis tools and resources
#18awesome-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
#19barry-far/V2ray-Config
Free V2ray Configs, Updating Every 15 minutes. 🚀🌐
#20PuddinCat/BestClash
每30分钟更新！免费Clash翻墙订阅，自动从网上爬取并测速 | 免费代理 | VPN | 订阅 | 节点 | clash meta | mihomo | 翻墙 | 科学上网 | 梯子 |
#21ts-sf/fly
free vpns now available;翻墙-科学上网、免费翻墙、免费科学上网、VPN;免费shadowsocks/ss/ssr/v2ray节点
#2214790897/handwriting-web
将文本转为模拟手写文字的网页版
#23Anonym0usWork1221/Free-Proxies
Update free every 2 hours
#24mheidari98/.proxy
free proxies
#25dpangestuw/Free-Proxy
Free Proxy List 🔄 Update Every 5 Minutes
#26alistaitsacle/free-llm-api-keys
Free LLM API keys for GPT-5.4, Claude, DeepSeek, Gemini, Grok — copy, paste, use. Updated 3-5x daily. No credit card needed.
#27indmdev/Free-Telegram-Store-Bot
This is 100% Free Shop Bot, Is a Telegram Store Bot you can use for selling your products and services and managing your products and orders. You customers can easily shop on you store with confidence using this Auto shop bot.
#28Skillter/ProxyGather
Sophisticated proxy scraper and checker