I have been following Twitter Bootstrap project closely since it was announced open-sourced last year and this year it has reached it's version 2.x which is good progress. I have recommended this to my team for couple of projects and had my hands on it for a while.
Today it has grown up to a very mature level where we can use it as a complete web-application UI which is feature-rich with many jQuery plugins and beautiful eye-candy CSS buttons, menu-bar etc.
I think I forgot to mention that it's completely CSS3 and HTML5 framework and you can use it to build mobile web-interfaces too. The forms elements styling offered out of the box are too good (killer...!)
The components which Twitter bootstrap packs in the framework are:
- Buttons (Yes, they are beautiful out-of-the-box ready to be used)
- Navigation (packs 3 types of tabs and pills), Navbar, breadcrumb and pagination
- Labels, Badges and beautiful typography
- and Progress-bar
Now you might think that most of the CSS Frameworks will be packing such components, may be even may be more than what bootstrap has to offer but now here comes the real deal it comes with one dozen jQuery plugins integrated - which are just ready to be backed with your next web-application here are to name some of them:
- Modal (very well integrated with CSS)
- Dropdown (again beautiful integration)
- Tooltip (decent)
- Alerts (removable ones)
- Button groups, stateful and toggle
- Collapse (Vertical tabs)
- and Typehead (Google Suggest)