jQuery UI Bootstrap is a awesome jQuery UI theme that is inspired from Twitter’s project and brings the slickness of it to jQuery UI widgets.
With this theme, not only do you get the ability to use Bootstrap-themed widgets, but you can now also use (most) of Twitter Bootstrap side-by-wide with it without components breaking visually.
Requirements: jQuery & jQuery UI
Compatibility: All Major Browsers
Website: http://addyosmani.github.com/jquery-ui-bootstrap/
Download: https://github.com/addyosmani/jquery-ui-bootstrap/