The original WikiWikiWeb is at the Portland Pattern Repository at http://c2.com/cgi/wiki . It contains a ton of material on "an informal history of programming ideas." If you're curious about wiki, start exploring at Wiki:WhyWikiWorks and Wiki:WhyWikiWorksNot.
FunWiki is based on a Wiki Wiki Clone called UseModWiki. Other sites using the software include MeatBall:MeatballWiki. [WikiPedia] used to use UseModWiki, but now uses its own Wiki software called MediaWiki?.