WikiWikiWeb is a collaborative hypertext system by a guy called Ward Cunningham. "Wiki is a composition system; it's a news server; it's a repository; it's a mail system. Really, we don't know quite what it is, but it's a fun
way of communicating asynchronously across the network." It works a lot like Everything. It's name comes from Hawai'ian - as Cunningham notes: "Wiki wiki means quick in Hawai'ian, at least I think (you think?) it does." Try http://www.c2.com/cgi/wiki?