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

Master programming by recreating your favorite technologies from scratch.

Interactive roadmaps, guides and other educational content to help developers grow in their careers.

A complete computer science study plan to become a software engineer.

A collective list of free APIs

📚 Freely available programming books

freeCodeCamp.org's open-source codebase and curriculum. Learn math, programming, and computer science for free.