Pixi.js - Fast lightweight 2D library that works across all devices
Animo.js - Animo.js is a lightweight, open-source tool that enables developers to manipulate animations and transitions.
Substance - A JavaScript library for web-based content editing
Magic Animations CSS3 - CSS3 Animations with special effects.
Anime.js - Lightweight JavaScript animation library
Ceaser - Ceaser is a handy CSS Easing Animation tool for creating any ease imaginable.