Ultra Nine O Headsetoptions | Download | Demo

Ultra Neo WP theme

3C SEO | Download | Demo

3C SEO WP Theme

SEO basics | Download | Demo

SEO Basic WP Theme

Elements of SEO | Download | Demo

Elements Of-SEO Wordpress Theme

Open Air | Download | Demo

Open Air theme

SEO Blaze | Download | Demo

SEO Blaze WP Theme

More resources:

Daily Blog Tips – Popular WordPress themes.
http://www.dailyblogtips.com/wordpress-themes/

Brian Gardner – Very Clean and Elegant WordPress Themes
http://www.briangardner.com/themes

Courtney Tuttle – SEO WordPress Themes – Lots to choose from
http://courtneytuttle.com/seo-wordpress-themes/

50 Best Free WordPress Themes Gallery – Look around while you are there, Kyle has several galleries that are pretty amazing
http://hackwordpress.com/50-best-free-wordpress-themes-gallery/

Head Set Options – Over 100 Themes
http://www.headsetoptions.org/support/

Search Engine Optimized WordPress Themes
http://www.seowordpressthemes.com/

Styleshout
http://www.styleshout.com/free-templates.php

Premium Free WordPress Themes – There are some very nice themes on this sitehttp://freethemelayouts.com/

wpSnap – A directory of WordPress themes
http://www.wpsnap.com/blog/category/submit-your-themes/