In addition to vanilla CSS, Bootstrap Foundation Five includes support for the two most popular CSS preprocessors, Less and Sass , combining the two most popular CSS frameworks, Bootstrap and Foundation. It's like quadruple the power, or octuple the power if you square it.

Comprehensive docs

With Bootstrap Foundation Five, you get extensive and beautiful documentation with hundreds of live examples, pulled from every version of the code base of each of the frameworks. No more going to different versions of documentation just to look up what works for the framework you're currently using. Now you can look up every function for every version you've ever used. Simple.