Selectivizr : CSS3 pseudo-class and attribute selectors for IE 6-8
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.
Photon : UI toolkit for building desktop apps with Electron.
