Project: https://github.com/dperini/nwmatcher
Website: http://javascript.nwbox.com/NWMatcher/
Fast JavaScript CSS Selector Engine and Matcher.
REM Unit Polyfill
Project: https://github.com/chuckcarpenter/REM-unit-polyfill
Website: http://chuckcarpenter.github.io/REM-unit-polyfill/
The polyfill will test any browser for REM support and patch it up if needed, although we all know IE8 and below is where the issue lies. Once lack of support is determined, it reads all the link tags for stylesheets and finds selectors that have rules using the REM unit. It then recalculates those rules to PX and writes them in the head to override in the cascade. Magic.
FastClick
Project: https://github.com/ftlabs/fastclick
Website: none
FastClick is a simple, easy-to-use library for eliminating the 300ms delay between a physical tap and the firing of a click event on mobile browsers. The aim is to make your application feel less laggy and more responsive while avoiding any interference with your current logic.
Foundation
Perhaps the most advanced responsive front-end framework in the world. Foundation provides the foundation needed to built a mobile-first, responsive website.
Project: n/a
Website: http://foundation.zurb.com/
Related: Bootstrap
Bootstrap
Bootstrap is the most popular HTML, CSS, and JS framework for developing responsive, mobile first projects on the web. Bootstrap makes front-end web development faster and easier. It’s made for folks of all skill levels, devices of all shapes, and projects of all sizes.
Project: https://github.com/twbs/bootstrap
Website: http://getbootstrap.com/
Related: Foundation
HTML5 Shiv
Project: https://github.com/aFarkas/html5shiv
Website: n/a
This script is the defacto way to enable use of HTML5 sectioning elements in legacy Internet Explorer. The HTML5 Shiv enables use of HTML5 sectioning elements in legacy Internet Explorer and provides basic HTML5 styling for Internet Explorer 6-9, Safari 4.x (and iPhone 3.x), and Firefox 3.x.