Top 6 alternative sites to two.js.org
Paper.js
Snap.svg
PixiJS
Official site for PixiJS, The HTML Creation Engine.
Fabric.js Javascript Canvas Library
WebGL.com - Beauty at the intersection of Math, Code & Design
Explore WebGL, a JavaScript API for rendering interactive 2D & 3D computer graphics within any compatible web browser without the use of plugins
Some websites with similar theme to two.js.org include:
Blotter.js
A JavaScript API for drawing unconventional text effects on the web.
Author: Bradley Griffith