G M A N
GNU GMAN
A GPL RenderMan Implementation

Interesting Links, and Related Resources
RenderMan
GMANThe GMAN Toolkit
GMAN mailing list Discussion of GMAN and GMAN development.
Pixar Animation Studios The pioneering animation company.
RenderMan SpecificationPixar's RenderMan Specification
Blue Moon Ray Tracing ToolsA very good shareware implementation of RenderMan.
Modelers
K-3D An up and coming new modeler that outputs RIB/RenderMan format files.
Extreme WaveA modeler supporting animation.
MagicLight MagicLight Free Modeler
MindseyeFree modeler project
Free Rendering Systems
GNU PanoramaAnother free rendering system released under the GPL.
POV-Ray GMAN would not exist if these guys didn't ignore my E-Mail :)
Free Animation Systems
MAM/VRS MAM and VRS graphics and animation API and abstraction layer.
Misc.
John Cairns' HomepageWierd stuff from beyond infinity...
The Affine Toolkit Helpers and tools for object manipulation.
Mesa GL Library Awesome GL library.
The GNU ProjectFree Software of all kinds.
The Free Software FoundationFree Software issues.
The Free Film ProjectFree Tools for 3d, CGI, and AV.