For more information on ACM and ACM SIGGRAPH:
Communities & News:
CG Channel
CGTalk
od[force]
vfxsoup
VFX Talk
VFXWorld
Software - 3D - Commercial:
3D Studio MAX
Animation Master
Cinema 4D
Houdini
Lightwave
Maya
messiah
Softimage
Software - 3D - Free:
Ayam
Blender
K3D
OpenFX
Wings 3D