3D Studio Max
Very professional modeller for creating game content. Works very well with iZigoo.Saving in .3ds is the
best way to import into iZigoo.

BVHacker
Free animation tool for bvh animation files.


XSI - free and commercial versions
Complex and powerful renderer. The export of static models in .obj format works very well.
iZigoo can load them without problems.


Grome
Terrain modeller
http://quadsoftware.com/index.php?m=section&sec=product&subsec=editor

Blender (Free)
Free modeller
http://www.blender.org/

Cinema 4D (Commercial)
Good rendering and modeling tool. Much cheaper then 3d studio but it has nearly the same functions.
http://www.maxon.net

NGplant (Free)
Great tool to create trees for iZigoo.

Arbaro (Free)
Another tool to create trees for iZigoo.
http://sourceforge.net/projects/arbaro