jQuery Mobile
jQuery Mobile Framework
Fastclick
Polyfill to remove click delays on browsers with touch UIs
Hammer.js
A javascript library for multi-touch gestures // You can touch this
Swipe
a lightweight mobile slider
Jo
Jo is a thin (~12K) candy shell for PhoneGap apps. It's an HTML5 mobile app framework which provides UI widgets, a flexible event model, a wrapper for sound, and a light data layer. Apps are skinnable with CSS3, and work everywhere PhoneGap does... and then some, including Adobe Air and OSX (desktop and dashboard).
Jquery UI
The official jQuery user interface library.