Skeleton: Responsive CSS Boilerplate

You should use Skeleton if you’re overwhelmed by UI frameworks like Bootstrap and Foundation or if you’re embarking on a smaller project. Skeleton only styles a handful of standard HTML elements and includes a grid, but that’s often more than enough to get started. In fact, this site is built on Skeleton and has ~200 lines of custom CSS (half of which is the docking navigation).
http://getskeleton.com/#examples