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 ...
enquire.js : A lightweight, pure JavaScript library for responding to CSS media queries.
DD_belatedPNG : better PNG background-image support in IE6
Styletron : Styletron is a universal CSS-in-JS engine built from the ground up for high-performance.
AOS : Animate On Scroll Library.
Small library to animate elements on your page as you scroll.
CSS Animation Library for eccentric web developers.