Arcus is a raytracer designed to trace images in arbitrary cordinate systems (taking into account the effects of general relativity). It is cross-platform, and makes use of the GNU GSL and (optionally) MPI and SDL.
License: GNU GPLv3
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!