Bootstrap Twitter

Twitter Bootstrap

Twitter Bootstrap is a free set of tools for building web applications. It comprises template files, as well as optional JavaScript extensions. Developed by a couple of engineers at Twitter (hence the name), it was originally designed to help provide some consistency across tools the guys were building internally.

Advantages of Bootstrap

Save Time
Customizable
Factor in the Design(Grid, Less, Javascript)
Consistency
Updates with JqueryUI and Javascript
Integration with any programing language
Responsiveness
Future Compatibility
Competitiveness
Impressive docs