jQuery UI has great flexibility for styling. Take a look at the ThemeRoller for a current look at what is on offer, but here are some quick alternatives picked from that page. Implementing one is as simple as adding a stylesheet:


Base

'UI lightness'

'Start'

'Le Frog'

'Cupertino'

'Vader'

Some Sample UI elements

Accordian

First header

First content

Second header

Second content

Third header

Third content

Fourth header

Fourth content

Tabs

Tab 1

Content Block 1

Tab 2

Content Block 2

Tab 3

Content Block 3

Slider

Datepicker

Progress Bar

Dialogs & Buttons

<= A jQuery UI Button

<= A Bootstrap Button
Bootstrap has its own styles of course, which I haven't demo'd here, but you can see for yourself.