Wiki Wiki Clones - Links to dozens of Wiki system types, in many programming languages, on many thousands of topics.SCG Swiki - Swiki of the Software Composition Group, Computer Science Institute, University of Berne, Switzerland. More graphical than most Wikis.
Squeak Swiki - A Swiki is a Wiki written in Squeak Smalltalk. This one is often hard to reach, but very worthwhile.
WikiWeb - The first Wiki by its inventor, Ward Cunningham. Written in Perl.
TWiki.org - Web-based collaboration tool, written in Perl: revision-control, templates, category tables, authorization based on groups, automatic email notification of changes, file attachments, search, more. Professional, powerful.
TWiki: SourceForge - SorceForge site for TWiki. TWiki has it's roots in JOSWiki.
Py Wiki - Wiki done in Python.
Everything2 - Like a Wiki, but also creates its own links, with other differences. Seems to be growing its own subculture.
Parsimony - Public Wiki server with 25.000 free Wikis.
Vanilla: start page - Wiki begun and prototyped in Python, rewritten in REBOL.
Everything Development Company - Site of creators of the Everything Web System being used at Everything2 and PerlMonks. Information on downloading, installing, configuring.
Metababy - Edit existing pages, create new ones, and experiment.
MeatballWiki - Interested in online communities, culture, hypermedia. Topics range from intellectual property to cyberpunk to uniform resource identifiers; and a good reference on Wiki technology.
ZWiki.org - Information and demonstration site about a Wiki implementation that runs on Zope.
RWiki - Yet another WikiWiki Clone made to be a sample using dRuby, ERb, RDtool, MutexM; inspired by Tiki.
