Wordpress Theme Designer – Website with many magazine styled WordPress themes that are monetized for good Banner Ad Integration.
Wordpress Theme Design and Consulting – Custom WordPress themes and general blog consulting. Includes tips for theme design.
Wordpress Plugins and Themes – Wordpress Plugins and Themes available for free download.
Using Themes – The official WordPress codex help page for using themes.
Top WP Themes – Download quality and professionally designed WordPress templates for free. Also allows user ratings of themes.
Themes Pack – A collection of free WordPress Themes from various styles.
Themes Junction – A website with many free wordpress templates.
Simple WordPress Themes – WordPress theme site featuring third party themes. Each theme posted has a thumbnail preview, download link, and demo where available.
Premium WordPress – A site that showcases free and premium WordPress themes. Also resources from premium sites of WordPress.
Omni WordPress Theme – A site showcasing a premium highly-customizable WordPress theme.