Son zamanlarda bir çok ajans tarafından kullanılan, bootstrap'in 2.1 versiyonu yayına alınmış ve bir takım yenilikler gelmiş.

http://blog.getbootstrap.com/2012/08...-1-0-released/

Yeni Gelen Değişiklikler :

• Submenu support on dropdowns
• Affix JavaScript plugin
• Block level buttons
• State classes on table rows
• Improved disabled states on navs and dropdowns
• The navbar component is now white by default, with an optional class to darken it
• Improved prepended and appended inputs
• New base font-size and line-height
• Added variable for navbar collapse trigger point
• Fluid grid offsets
• Fluid grid system variables are no longer fixed percentages
• Removed LESS docs page

https://github.com/twitter/bootstrap/wiki/Changelog