learning

DeepTutor: Lifelong Personalized Tutoring. https://deeptutor.info/.

Evidence-based learning engine for Claude Code — first-principles curricula, free-recall verification with receipts, FSRS-scheduled memory, and explorable artifacts. Learn anything; keep it.

Build a system, load it until it breaks, and watch why. A system design simulator for learning distributed systems.

Over 1000 flashcards to learn Rust, SQLite, Lua, C, Godot, or Wolfram Language from first principles. Written in markdown with script to convert them to Anki decks or PDF files.

The universe in numbers. Free, open-source calculators for everything countable.