A collective list of free APIs

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

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.

Паттерны проектирования

Take notes while watching any video on the web, in the same window.

Changes the Telegram bio, profile picture, first and last name to the song that the user is currently listening to.