Freshmeat page: http://freshmeat.net/projects/libixp/
Libixp is a stand-alone C/posix implementation of the 9P protocol (in particular its last incarnation: 9P2000/9P2K). It includes both client and server functionality.
License: MIT-style license
This project has the following developers:
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.
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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!