I have created a page for the website license to be found at http://supertuxkart.sourceforge.net/Website_License#STK_Site_Design. The information on the page is to the best of my knowledge. Please correct me where I am wrong. The page awaits approval.
Here is what the page says:
The STK site design is under the GNU GPL and was designed by Tom Jenkins of TNT Web Media.
The STK site wiki software is as dictated by MediaWiki:
"This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version."