… a Beautiful Boilerplate for Responsive, Mobile-Friendly Development […] a small collection of CSS & JS files that can help you rapidly develop sites that look beautiful at any size, be it a 17" laptop screen or an iPhone.

(Free Themes Directory)

Just another awesome WordPress.com theme

… an Automattic-produced theme designed and developed by the Theme Team which, apart from the custom possibilities you’re acquainted with in most of our themes — features like custom backgrounds, headers, and menus — is also equipped with a custom Showcase Page Template that can propel your site up to a new level.