More network technologies...

wiki

http://c2.com/cgi/wiki?WelcomeVisitors
http://c2.com/cgi/wiki?WardsWiki

http://c2.com/cgi/wiki?WikiBase

http://wiki.org/wiki.cgi?WhatIsWiki - this is general from google.
http://c2.com/cgi/wiki?SisterSites

http://www.wikiindex.com/Wiki_Index
http://www.wikiindex.com/Category:Wiki_Language
http://meta.wikimedia.org/wiki/Names - better page of definitions with links to origin etc...