Master programming by recreating your favorite technologies from scratch.

• UpdatedDec 26, 2025
• Markdown

A collective list of free APIs

• UpdatedFeb 19, 2026
• Python

DigitalPlat FreeDomain: Free Domain For Everyone

• UpdatedJan 9, 2026
• HTML

📚 免费的计算机编程类中文书籍，欢迎投稿

• UpdatedJul 15, 2024

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

• UpdatedJul 22, 2025

The Secure CommsOS™ for mission-critical operations

• UpdatedFeb 20, 2026
• TypeScript

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 👇🏼

• UpdatedFeb 20, 2026
• Jupyter Notebook

🐧 A list of awesome Linux softwares

• UpdatedFeb 16, 2026
• HTML

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

• UpdatedFeb 18, 2026
• Python

插件化、定制化、无广告的免费音乐播放器

• UpdatedJan 6, 2026
• TypeScript

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

• UpdatedJun 29, 2024
• TypeScript

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

• UpdatedJun 23, 2025
• Python

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

• UpdatedJan 6, 2026

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

• UpdatedJan 23, 2026
• Python

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

• UpdatedJul 2, 2024
• HTML

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.

• UpdatedFeb 20, 2026
• C#

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

• UpdatedFeb 20, 2026
• JavaScript

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.

• UpdatedFeb 14, 2026
• PHP

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

• UpdatedAug 14, 2024
• TypeScript

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

• UpdatedSep 19, 2025
• JavaScript

abaplint

ABAP quality assurance and static analysis

Depfu

Automated dependency updates done right

Datree

YAML configs and K8s manifests validation tool

Review Notebook App

Code Review & Collaboration for Jupyter Notebooks

Crowdin

Agile localization for your projects

AccessLint

Find accessibility issues in your pull requests

WIP

DO NOT MERGE – as a service

cto.new

Completely free AI code agent. Use the best frontier models from Anthropic, OpenAI & more with no credit card or API keys

LogRocket

Record videos of user sessions with enhanced logging information

Percy

Automated visual review platform

Airbrake

Frictionless error monitoring and performance insights for your entire app stack

Codefresh

A modern container-based CI/CD platform, easily assemble and run pipelines with high performance

Moesif API Analytics and Monetization

Powerful API analytics and usage-based billing to monetize APIs

Atlassian

GitHub for Atlassian unifies data, automates workflows, and syncs development across GitHub, Jira, and your Atlassian apps

Git X-Modules

A better way to manage modular Git projects