jQuery Mobile touch-optimized web framework for smartphones & tablets now stable with V1.0. HTML5-based user interface system for all popular mobile device platforms, built on the rock-solid jQuery and jQuery UI foundation. Its lightweight code is built with progressive enhancement, and has a flexible, easily themeable design.
jQuery Mobile already supports a huge set of mobile browsers, has theThemeRoller for mobile and it is very well-documented with guides + examples for an easy start.
The framework includes many widgets for (touch-optimized) mobile layouts: toolbars, buttons, pages/dialogs, content formatting, list views and forms. All built on jQuery core for a familiar and consistent syntax.
Compatibility: All Major Mobile Browsers
Website: http://jquerymobile.com/
Demo: http://jquerymobile.com/demos
Download: http://jquerymobile.com/download/