jQuery UI is a jQuery User Interface library, it provides many frequently used components and functions. It consists of datepicker, slider, progress bar and drag and drop support etc.Also it has many themes, you can use ThemeRoller to customize your own theme. But with ThemeRoller, we can still find the shadow of jQuery UI.If you want some highly customized, free and high quality jQuery themes such as Bootstrap, Windows-Metro, then the following themes may suit you.1. jQuery UI BootstrapjQuery UI Bootstrap is a jQuery UI theme, it is encouraged by Twitter's Bootstrap, it introduces slickness i...