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.

A feature-rich command-line audio/video downloader

💫 Toolkit to help you get started with Spec-Driven Development

Linux, Jenkins, AWS, SRE, Prometheus, Docker, Python, Ansible, Git, Kubernetes, Terraform, OpenStack, SQL, NoSQL, Azure, GCP, DNS, Elastic, Network, Virtualization. DevOps Interview Questions

Turn any PDF or image document into structured data for your AI. A powerful, lightweight OCR toolkit that bridges the gap between images/PDFs and LLMs. Supports 100+ languages.

A list of useful payloads and bypass for Web Application Security and Pentest/CTF

💻 A fully functional local AWS cloud stack. Develop and test your cloud & Serverless apps offline

A curated list of awesome Claude Skills, resources, and tools for customizing Claude AI workflows

A collection of learning resources for curious software engineers

aider is AI pair programming in your terminal

Portable file server with accelerated resumable uploads, dedup, WebDAV, SFTP, FTP, TFTP, zeroconf, media indexer, thumbnails++ all in one file

A curated list of awesome skills, hooks, slash-commands, agent orchestrators, applications, and plugins for Claude Code by Anthropic

An interactive TLS-capable intercepting HTTP proxy for penetration testers and software developers.

A cryptocurrency trading API with more than 100 exchanges in JavaScript / TypeScript / Python / C# / PHP / Go

What the f*ck Python? 😱

Intelligent automation and multi-agent orchestration for Claude Code

DSPy: The framework for programming—not prompting—language models

💫 Industrial-strength Natural Language Processing (NLP) in Python

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.

A book-in-progress about the Linux kernel and its insides.

120+ interactive Python coding interview challenges (algorithms and data structures). Includes Anki flashcards.

🔒 Consolidating and extending hosts files from several well-curated sources. Optionally pick extensions for porn, social media, and other categories.

Set up a personal VPN in the cloud

FAIR's research platform for object detection research, implementing popular algorithms like Mask R-CNN and RetinaNet.

A set of ready to use Agent Skills for research, science, engineering, analysis, finance and writing.

get things from one computer to another, safely

A list of free LLM inference resources accessible via API.

Claude Code skill implementing Manus-style persistent markdown planning — the workflow pattern behind the $2B acquisition.