Half-Baked is a 2-column, red theme with support for a variety of plugins and a dynamic sidebar.
The Harvest is a 2-column theme designed specifically for use on tech or photography blogs.
Identity is a 3-column theme with black and white colors.
My Diary is a 2-column theme for personal blogs.
Redtopia is a 2-column, simple theme with bright red colors.
That Half Baked theme by Guy Fisher is really nice. Its a nice blend of color and features but it still seems minimalist as well. If I hadn’t hacked out my own theme, I might have considered this one for my site.