This is a gallery of screenshots of the themes available for Drupal, an open-source platform and content management system for building dynamic web sites. Drupal is available here.
ADC - Viewed on Safari
Almaw - Viewed on IE Mac
Blue Robot 2
Interlaced (note - this theme is CSS based and comes with several variations)
(Smarty themes don't work on my server, probably something having to do with paths, or Safe-mode.)