This is a feature possible in TikiWIki 1.9 Where you can import and export Tracker setups. The donatations are accepted through the main SourceForge project page http://sourceforge.net/projects/tikiwiki. There are some $ icons next to the project admin names.
Register at tiki.org and you'll be able to use the account at any *.tiki.org site, thanks to the InterTiki feature. A valid email address is required to receive site notifications and occasional newsletters. You can opt out of these items at any time.