Graphicsmagick with an extra function for scale-cropping images:
Simpler, saltable sha-3.
Pixelated unicorns for your server.
immutablejs patch-based synchronization
Convert any dom tree to an image element
Random string generator
Minecraft-style terrain generation seeded noise functions
Simplex noise scaled to a uniform distribution
Polygon art generated from a random seed
canvas element polyfill for the backend
Pack rectangles (or images) into a rectangle (or canvas texture atlas).
Next-generation browser OS utilities
Procedurally generated pixel creatures in JS + HTML canvas
Three.js VR world procedurally generated in the browser.
Voxel meshing for threejs
Bullet Physics 3 server for node.js. Designed for multiple realtime clients.
Keyed in-memory mutexes
Certificate generation utils
Node file system hasher
Load 3D models from various formats and place them in the world scene.