Master programming by recreating your favorite technologies from scratch.

A collective list of free APIs

DigitalPlat FreeDomain: Free Domain For Everyone

📚 免费的计算机编程类中文书籍，欢迎投稿

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

The Secure CommsOS™ for mission-critical operations

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 👇🏼

🐧 A list of awesome Linux softwares

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

插件化、定制化、无广告的免费音乐播放器

📚 The definitive guide to TypeScript and possibly the best TypeScript book 📖. Free and Open Source 🌹

🆓免费的 ChatGPT 镜像网站列表，持续更新。List of free ChatGPT mirror sites, continuously updated.

A collection of services with great free tiers for developers on a budget. Sponsored by Mockoon, the best mock API tool. https://mockoon.com

The Concise TypeScript Book: A Concise Guide to Effective Development in TypeScript. Free and Open Source.

Kavita is a fast, feature rich, cross platform reading server. Built with the goal of being a full solution for all your reading needs. Setup your own server and share your reading collection with your friends and family.

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

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

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.

Drag and drop page builder library written in vanilla javascript without dependencies or build tools.

An amazing UI for OpenAI's ChatGPT (Website + Windows + MacOS + Linux)