Twitter Bootstrap is, by far, my favorite front-end framework. It's pretty widely used at most tech incubators (e.g. y-combinator), and I have personally had great results with it. In fact, Helpified is still built with Bootstrap, just slightly modified and updated. If you're looking to prototype a web application or website, start here.
WrapBootstrap is a marketplace for premium themes and templates for Twitter Bootstrap. You can buy or sell Bootstrap themes! The themes are great, and pretty cheap. <br><br>This is also very valuable on another front. Where is the best place to vet out high quality Twitter Bootstrap developers if you need to hire one? On a site where they're showcasing their work of course! <br><br>Every theme is linked to a profile of the developer that created it. Many of these developers are incredibly talented and looking for work. You can message them directly through the site with inquiries. Edit Remove Move
Yep! Another marketplace for templates you can use with Twitter Bootstrap. Worth a look. Edit Remove Move
If you want to build your skills in a little more structured fashion, give this Udemy course a shot. It doesn't really go too far into detail, but it's a great start for anyone that hasn't built with bootstrap before. Edit Remove Move
This is a huge, amazing list of Twitter Bootstrap resources. Honestly, anything you need for Bootstrap is listed here. <br><br>I'll list some of the more important items inside of this toolset, as well. Edit Remove Move
Twitter Bootstrap is pretty easy to create great front-ends without the help of any external tools. However, these templates make it even easier. <br><br>Everything listed here is free! Great looking site, by the way. Obviously built with bootstrap. Edit Remove Move