A SmartWiki (written in ErlangLanguage) in which pages are literate programs written with embedded Scheme code. Pages are also language-level modules, and can refer to and build on one another. Scheme code can either be evaluated to show a simple result, or used for dynamic HTML generation.
Now with the more memorable URL http://gallery.vegetable.org/
See SchemeWiki, Meatball:SelfProgrammingWiki, also a Perl SelfProgrammingWiki at http://purl.net/net/spw
See also ReflectiveWiki, MetaBaby