100+ AI Agent & RAG apps you can actually run — clone, customize, ship.

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

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

A go-to tool for scanning network. Scan all the open ports for a given host with just one click.

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