Model/3D Editing
Texture/2D Editing
Plugins/3D Editing
.FBX plugins - This is a set of plugins for most commerical 3d programs that will provide the ability to export and import using the .fbx format, which is a robust file format that will retain most of the features [animation keys, UV's, texture assignments, etc.] of a asset on translation.
Cuneyt Ozdas 3dsmax plugins - A bunch of free and commercial plugins for 3dsmax for rendering and texture composition.