Ti Ki

Tiki is one of the WikiEngines.

Demo: http://todo.org/cgi-bin/en/tiki.cgi - I got a 404 error. Remove link?

The Japanese Tiki page works (but still includes a link to the above 404): http://www.hyuki.com/yukiwiki/wiki.cgi?Tiki

basically colorful
theme support
This acts as CGI program.
maybe relatively small.
Intrinsic diff and versioning functionality
Very simple text formatting rules
Digits and lower-case WikiName and multibytes character supported by [[]] format. EUC kanji character is supported, Big5 might be supported.
Very simple version management
text file based, not using database
User-editable InterWiki (originally implemented)
referers recognition over InterWiki
automatic referrer insertion when creating new page
plugin framework is supported; colorful table, one line comment and attractive something etc.
there are various plugins
free software
one installation supports multiple nodes (sites).
sister wiki/friend wiki --- automatic link to other wiki sites; and clustering many wikisites
rdf/rss
serverside applet(using intrinsic internal scheme interpreter) --- WikiServerSideApplet
server side page cache
visualtour

Ooh... I like that [[link]] format. I think I'll steal it. :-)

Maybe TikiWiki would be a better page name for this? (Afer all, this is WardsWiki. ;-)

Someone got TikiWiki after my naming Tiki. :-)