Facebooked is a 3-column, widget-ready theme based on the social networking site.
Loopy Red is a 3-column, red theme.
Love is a 2-column, widget-ready theme that pays homage to WordPress.
Pigments is a 2-column, blue-and-green theme.
Pink for October is a 2-column theme with pink, black and white colors created for breast cancer awareness month in October.
Ranting Daily is a 2-column, widget-ready theme.
Saur is a 3-column, widget-ready theme that features a random image, big search bar, and comment counter.
T1 is a nice-looking Tumblelog theme with styling classes for several different types of entry.