Anime.js : Anime.js is a fast, multipurpose and lightweight JavaScript animation library with a simple, yet powerful API.
It works with CSS properties, SVG, DOM ...
98.css : 98.css is a CSS library for building interfaces that look like Windows 98.
Styletron : Styletron is a universal CSS-in-JS engine built from the ground up for high-performance.
emotion : emotion is a high performance, lightweight css-in-js library that supports both string and object based styles.
Wave.js : Audio visualizer library for javascript. Create dynamic animations that react to an audio file or audio stream.
CSS Animation Library for eccentric web developers.