Thetalkingfowl is a minimal HTML5 wordpress theme. It integrates the HTML5 Boilerplate and the 960 grid css framework.
It comes with the following features:
Timeline post page
Theme options menu
Plugin-free Twitter and Flickr feed
Tranquil Reflections is a free wordpress basic theme.
Demo Tranquil Reflections
Lazy Sunday is a free wordpress theme for artists and photographers.It supports WordPress post thumbnails, custom header and background functions, custom drop-down menus and a widgetized footer.
Asokay is a free wordpress theme with a classic 2-column layout.The theme is built from the Toolbox theme by Automattic and using HTML5 and CSS3.
Undedicated is a free minimal WordPress theme with custom header and background. Adsense-ready, Threaded comments , customizable with theme options.
Foghorn is a free minimalist wordpress theme built from Twenty Eleven theme.