Green wordpress theme with twitter support and 2 sidebars. Visit http://www.customblogdesigner.com/greentweet-wordpress-theme/ for usage instructions and support
A dark and minimalist theme with subtle gradations (if you look carefully !) - fixed-width, two colums, right sidebar - released under GPL - valid XHTML & CSS
Modern Style Theme with theme options page. Fixed-width, widget ready, two colums, right sidebar support hierarchical categories. Compatible with Wordpress 2.8 and higher.
Three Column, paint theme. The page navigation is up top going across. The blog links and blogroll are in the second column, and the search and site meta are in the third.
Elegant 3-column Theme with Admin Options for easy customization of Header image, Background Color, Search Box, Post Meta Data, RSS Icon, etc. Easily turn on/off Search Box, RSS Icon. Theme designed by www.dkszone.net.
Stylish theme having three columns with content in center. Fixed-width, widget-ready, translation-ready, paged Navigation and threaded comments. Several options available to customize the theme. Custom description or latest tweet for the header. Add-to-any sharing button available below each post. Compatible with wordpress 2.7 and higher upto 2.8.4. Valid XHTML and CSS. Compatible with IE 7+, Firefox 3.0+, Safari 3.0+, Chrome. Demo with all options enabled: http://nischalmaniar.info/wpthemes/?themedemo=white-gold