Uni-Form is a cool tool from Dragan Babić of Superawesome. The CSS library standardizes form markup (xhtml) and css, and "modularizes" it so even people with only basic knowledge of these technologies can get nice looking, well structured, highly customizable, semantic, accessible and usable forms. Download the plug and play XHTML and CSS and you're ready to go.

http://sprawsm.com/uni-form/