For those of you currently using Twitter Boostrap in your website, Bootstrap announced version 3.3.2 yesterday! The release is focused on bug fixes, accessibility improvements, and documentation updates. It includes over 300 commits from 19 contributors.
Full details of the 3.3.2 release can be found on their blog post.
Twitter Bootstrap is an HTML, CSS, and JS framework that assists in developing responsive websites. They have lots of examples and great documentation to get you started.
BuiltWithBootstrap.com is a good resource to learn more and stay current on Boostrap. They have website examples and also provide Bootstrap news and tips.