Wiki-wiki is the Hawaiian term for quickly, and Chiq-chaq is the Hebrew term for quickly. WikiWikiWeb is a pioneering free_site
that was created by Ward Cunningham at http://c2.com/cgi/wiki
The original Wiki site deals with software development and patterns, but it inspired numerous other similar sites in a variety of subject domains: PublicWikiForums.
The book The Wiki Way was written about wiki_wiki and other sites of its kind.