Paper.js - Open source vector graphics scripting framework that runs on top of the HTML5 Canvas.
Move.js - Move.js is a mini Javascript library that provides CSS3 animations.
p5.js - JS library for creating graphic and interactive experiences
Magic Animations CSS3 - CSS3 Animations with special effects.
Three.js - A JavaScript 3D library which makes WebGL simpler.
Anime.js - Lightweight JavaScript animation library