Bootstrap themes and templates curated in one totally free, high-quality collection. Bootstrap designers and developers can use these free templates and themes to kickstart Responsive Web Design projects.
You most certainly know about Twitter Bootstrap - the popular front end framework for building websites and apps. It favors simple, responsive design, and comes bundled with a sensible default stylesheet, a number of useful jQuery plugins ...
A free (libre), open-source (MIT license) HTML5 template built for responsive design. Skeleton's 12-column grid uses CSS media queries to automatically adjust page layout for the size of a viewer's screen or browser window.