Prebuilt is a simple red and white theme for WordPress. It has a top menu bar, relatively wide right side bar and an extended footer with Flickr integration.

From the site:

Prebuilt was created not to be heavily graphical and feature a lot of ajax goodness, but to be effective while at the same time, an easy way of learning Wordpress.

From the site:

Bosa is a calm, serene theme developed for WordPress.

From the site:

Ambiru is a calm, reassuring theme developed for WordPress.

Ambiru is an unique single column theme with a header image.

Gespaa is a single column blue gray theme.

From the site:

Gespaa is an attractive, smart theme that was originally designed for private use on this very blog.

An elegant and subtle theme based on the Photanical theme by Theron Parlin. Has a static header and a primary link bar.