Retro-fitted is a WordPress parent theme by Greenshady that’s perfect for bloggers. It supports WordPress nav menus, has several widget areas, and allows per-post layouts. This theme is completely free and open source.
Theme homepage: http://themehybrid.com/themes/retro-fitted
Support: http://themehybrid.com/support/
Download: http://wordpress.org/extend/themes/retro-fitted