A collective list of free APIs

📚 Freely available programming books

Learn how to design large-scale systems. Prep for the system design interview. Includes Anki flashcards.

AutoGPT is the vision of accessible AI for everyone, to use and to build on. Our mission is to provide the tools, so that you can focus on what matters.

Stable Diffusion web UI

A feature-rich command-line audio/video downloader

Command-line program to download videos from YouTube.com and other video sites

The agent engineering platform

The most powerful and modular diffusion model GUI, api and backend with a graph/nodes interface.

Magnificent app which corrects your previous console command.

Hunt down social media accounts by username across social networks

The official gpt4free repository | various collection of powerful language models | opus 4.6 gpt 5.3 kimi 2.5 deepseek v3.2 gemini 3

A natural language interface for computers

ALL IN ONE Hacking Tool For Hackers

Universal memory layer for AI Agents

A collection of learning resources for curious software engineers

Run frontier AI locally.

aider is AI pair programming in your terminal

Let us control diffusion models!

Certbot is EFF's tool to obtain certs from Let's Encrypt and (optionally) auto-enable HTTPS on your server. It can also act as a client for any other CA that uses the ACME protocol.

🦔 PostHog is an all-in-one developer platform for building successful products. We offer product analytics, web analytics, session replay, error tracking, feature flags, experimentation, surveys, d…

If you live in the terminal, kitty is made for you! Cross-platform, fast, feature-rich, GPU based.

The OWASP Cheat Sheet Series was created to provide a concise collection of high value information on specific application security topics.

Set up a personal VPN in the cloud

Ready-to-use OCR with 80+ supported languages and all popular writing scripts including Latin, Chinese, Arabic, Devanagari, Cyrillic and etc.

Make Your Company Data Driven. Connect to any data source, easily visualize, dashboard and share your data.

This is a fun, new monospaced font that includes programming ligatures and is designed to enhance the modern look and feel of the Windows Terminal.

🗃 Open source self-hosted web archiving. Takes URLs/browser history/bookmarks/Pocket/Pinboard/etc., saves HTML, JS, PDFs, media, and more...

Google Chromium, sans integration with Google

Maple Mono: Open source monospace font with round corner, ligatures and Nerd-Font icons for IDE and terminal, fine-grained customization options. 带连字和控制台图标的圆角等宽字体，中英文宽度完美2:1，细粒度的自定义选项