jQuery Mobile is a HTML5-based user interface system designed to make responsive web sites and apps that are accessible on all smartphone, tablet and desktop devices.

Seriously cross-platform with HTML5 jQuery Mobile framework takes the "write less, do more" mantra to the next level: Instead of writing unique applications for each mobile device or OS, the jQuery mobile framework allows you to design a single highly-branded responsive web site or application that will work on all popular smartphone, tablet, and desktop platforms. Browser Support

Theming: Built to be branded We believe that your web site or app should feel like your brand, not any particular OS. To make building highly customized themes easy, we've created ThemeRoller for Mobile to make it easy to drag and drop colors and download a custom theme. For polished visuals without the bloat, we leverage CSS3 properties like text-shadow and box-shadow .