Awkiawki is a small and light (and perhaps somewhat simple) wiki clone written in awk.
There is an alternative version or extension/hack page at http://184.108.40.206/cgi-bin/awki.cgi
License: Apparently freely distributable
New HTML Parser: The long-awaited libxml2 based HTML parser code is live. It needs further work but already handles most markup better than the original parser.
Keep up with the latest Advogato features by reading the Advogato status blog.
If you're a C programmer with some spare time, take a look at the mod_virgule project page and help us with one of the tasks on the ToDo list!