From WikiPrinciples.
Many WikiClones offer TextFormattingExtensions like:
- tables, e. g. http://www.wikiservice.at/tolkien/wiki.cgi?CdmlTable ( BrokenLink )
- headers, e. g. http://www.usemod.com/cgi-bin/wiki.pl?TextFormattingRules/WikiHeadings
- markers
- toc
- ...
that go beyond basic TextFormattingRules.