WikiMatrix – Compare Them All
http://www.wikimatrix.org/

Find the Wikis that match your personal needs: Just answer a few questions in the Wiki Choice Wizard or create a customized Search. Compare the Wikis of your choice in a comfortable side-by-side table. Just select them on the left and click the button. Use the forum to talk to other Wiki users, ask questions and discuss everything Wiki. Or find professional support in the Consultant Marketplace. This has been added to the tools section of Research Resources Subject Tracer™ Information Blog. This has been added to Bots, Blogs and News Aggregators presentation resources site.