wiki

wiki is short for wikiwikiweb, a collaborative web authoring system. see below.

• c2.com - ward cunningham's original wiki.
  
• EmacsWiki - a wiki for emacs, based on UseModWiki. This is nice because the implementation language is lisp.
  
• UseModWiki - the source of the EmacsWiki
  
• 
  MeatballWiki - seeking to be a community of communities.
  
• wikipedia - a community encyclopedia based on wiki