Master programming by recreating your favorite technologies from scratch.

A collective list of free APIs

Free domain registration and practical DNS learning resources for everyone.

📚 免费的计算机编程类中文书籍，欢迎投稿

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 👇🏼

插件化、定制化、无广告的免费音乐播放器

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

🐧 A list of awesome Linux softwares

Create polished demo videos without editing skills. Mac/Windows/Linux

📚 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

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.

CloudFlare free temp domain email 免费收发 临时域名邮箱 支持附件 IMAP SMTP TelegramBot

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

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

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.

Libre Hardware Monitor is free software that can monitor the temperature sensors, fan speeds, voltages, load and clock speeds of your computer.