enquire.js : A lightweight, pure JavaScript library for responding to CSS media queries.
jQuery Masonry : A dynamic layout plugin for jQuery
The flip-side of CSS floats
Selectivizr : CSS3 pseudo-class and attribute selectors for IE 6-8
emotion : emotion is a high performance, lightweight css-in-js library that supports both string and object based styles.
polyfill : polyfill makes web development less frustrating by selectively polyfilling just what the browser needs. Use it on your own site, or as a service.
