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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.

Data Engineering Zoomcamp is a free 9-week course on building production-ready data pipelines. Join the course here 👇🏼

The Secure CommsOS™ for mission-critical operations

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

Free and open-source macOS menu bar toolkit.

插件化、定制化、无广告的免费音乐播放器

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.

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

插件化、定制化、无广告的免费音乐播放器

Self-hosted multi-protocol AI API proxy for Antigravity, Codex, Grok, Kiro, OpenAI, Claude, and custom providers. Supports OpenAI-compatible API, Claude API, Gemini protocol conversion, GPT, Grok Build, Claude Opus, Gemini Pro, Kimi, MiniMax, provider pools, smart routing, and automatic failover.

YellowFruit third-party client

Curated list of 20,000+ hours and 200+ free courses with certificates in IT, CS, Design and Business.

Dedicated to JavaScript and its awesome community since 2015

Get PROXY List that gets updated everyday

Free, open-source crypto trading bot, automated bitcoin / cryptocurrency trading software, algorithmic trading bots. Visually design your crypto trading bot, leveraging an integrated charting system, data-mining, backtesting, paper trading, and multi-server crypto bot deployments.

Top free VPN (ClashX & V2Ray proxy) with subscription links. [免费VPN、免费梯子、免费科学上网、免费订阅链接、免费节点、精选、ClashX & V2Ray 教程]

[CASUALLY MAINTAINED] 轻小说文库 (Wenku8.com) 安卓版第三方公益App，始于2014年的初版Material Design风格、非盈利、Play Store上安装包最小的轻小说阅读器 (light novel reader)。目前网站的API由于被大量滥用，已更新成我自己架的 Cloudflare Worker API 中继节点，不然的话网站关闭API就全军覆没了。

Open Public Domain Exercise Dataset in JSON format, over 800 exercises with a browsable public searchable frontend

Prepare for GitHub Certification exams!

Guia completo em PT-BR para a certificação AWS Solutions Architect (SAA-C03), com resumo dos domínios, labs práticos, mapas mentais e simulados focados em arquitetura escalável, resiliente e segura na AWS.