One Column Themes
It’s simple, elegant and ultra-minimal. The theme uses an Ajax Accordion script to toggle display of posts and the archives/sidebar page.
Two Column Themes
Simplifi is a very simple theme, for people who publish a lot of content and don’t want a heavy design to waste space.
Quick Loading Theme, Widget ready, Minimalist Design, 2 Columns, Banner Ads Ready.
This free WordPress theme has a homepage template, posts of which can be configured through a config file. Widget-ready sidebar and Gravatar support.
Three Column Themes
3 Columns. Widget Ready. Minimalist Design. Awesome Menu Hover!
Up Front is a two/three column widget, Gravatar and Adsense ready WordPress theme.