Ahem, based on Hemmed is a 2-column, widget-ready theme with navigation bar and Hemmingway-style bottom bar.
Green Thoughts is a three column, green and black WordPress theme inspired by Half-Life and Green Lantern.
Puritan is a clean two column WordPress theme suitable for extending with stylesheets for print and handheld devices, proper use of
title for better SEO among other features.
Little Red Star has released New Day, Rock Princess and Neon Nights.
headsetoptions.org and Mandarin Musing have released Butterfly and Rubyx.
Lifebits is a minimalist theme designed for WordPress with smart screen-resolution detection and ajax search.