vptree.js: a JS implementation of the VP-Tree binary space partitioning algorithm.
Gear reference: a quick guide to the Gear build system.
Twin-bcrypt: the fastest pure-JS bcrypt password encryption algorithm implementation.
Live input events inspector
Live mouse events inspector
Live touch events inspector
Live orientation/motion events inspector
Data-URL conversion tool for images
Slow-motion video player with near-frame-by-frame playing and screenshots