Neural Network Playground
Interactive Machine Learning List
Python Tutor | Visualize Python Code Execution
CodeSkulptor3
CheckiO | Python Online Playground
ZygoteBody for learning human anatomy
The History of Philosophy
Mathigon
Parallel
Euclidea: Interactive geometric puzzles
Seeing Theory
MuscleWiki
Scratch Homepage
How to remember anything forever-ish
4Clojure
GitHub - rust-lang/rustlings: Small exercises to get you used to reading and writing Rust code!
Mathcha - Online Math Editor
Get started | Learning Music (Beta)
Music Theory Lessons - LightNote
MathBox: Tool for Thought (Algebra & Fourier Analysis)
the cryptopals crypto challenges
explainshell.com - match command-line arguments to their help text
Complex Analysis
LOOPY: a tool for thinking in systems
