Restive.js
The Easiest Way to Make your Website Responsive or Adaptive!
Agile
Agile Css3 Engine
Media Check
Control JS with mediaqueries
Pointer.js
Pointer.js consolidates pointer-like input models across browsers and devices.
Naver
A jQuery plugin for responsive navigation.
Responsible
Responsible.js - Give visitors the choice of what mobile experience they want. Adds Toggle for mobile to desktop switching without page reloads