Yvoschaap.com provides a free online Wordpress 2.1 Theme generator that allows you to create your own custom designed Wordpress themes without any knowledge of PHP, CSS, JS and HTML knowledge.

All you need to do is:

1) Set the site name, upload a logo and choose a color
2) Set the content body size in pixels
3) Set the Sidebar location in pixels
4) Choose the Menu layout
5) Select the colors and fonts for the theme’s background and text
6) And lastly, select a distribution method- Creative Commons, commercial, etc.

You can then begin distributing or selling Wordpress themes with a sponsor or your blog/website URL without worryng about resell rights.