Blender is a 3D creation suite with tools for modeling (advanced subdivision modeling, multiresolution sculpting), uv unwrapping, texturing (procedural node, 2D and 3D painting), animation, rendering, particles and simulation (including fluid dynamics, hard body physics, cloth and hair)
... [More], post-production with node based compositing and non linear editing, integrated game engine (with graphical programming, vehicle and rag doll constraints) and python scripting including an import and export suite.
Blender runs on all major operating systems including Windows, OS X, Linux.
The project is being facilitated by the public-benefit corporation Blender Foundation, established in the Netherlands. [Less]
A C# implementation of the Verse protocol. From the Verse homepage:
"Verse is a network protocol that lets multiple applications act together as one large application by sharing data over a network. If one application makes a change to shared data, the change is distributed instantly to all the
... [More] other interested clients. The protocol and associated data format are both heavily optimized for sharing data suitable for 3D graphics." [Less]