voxel.css : The goal of this project is to provide a lightweight 3D CSS library with very simple implementation.
Styletron : Styletron is a universal CSS-in-JS engine built from the ground up for high-performance.
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 ...
Skeleton : Skeleton: A Dead Simple, Responsive CSS Boilerplate for Mobile-Friendly Development
css3-mediaqueries-js : make CSS3 Media Queries work in all browsers (JavaScript library)