SweetBuzz White-blue Lite designed and coded by Brian Green and Darjan Panic is a two column, fixed width WordPress theme.
SimpleTwo is a really simple widget ready WordPress theme by Peterandrej. His other themes are also listed on the theme page.
Science Fiction and Red Rose are two WordPress themes by Vicky Child
God of Gates is a 2 column, fixed-width, sidebar widget ready theme.
Gladiola is a pristine, pastel-colored 2-column theme for WordPress and has a great combination of style and elegance. Other themes by Brian Gardner.
Durable is a completely customizable theme wrt colors and settings. Users can customize the colors that they wish to see on your sites. Admins have the same functionality and can even save these choices.
Red Business is the WordPress theme ported from Free CSS Templates.