Maya
Maya is a 3D Modelling/Animation/Simulation Tool Suite developped by Alias|Wavefront, originally mainly meant for artistic rendering and movie special effects production, Maya 4 and beyond have slowly but steadily started to show its face in the field of Video Game development. While not as heavily supported as some programs such as 3D StudioMax by Discreet in this field, its definitly beginning to show its usefullness for its easy modelling and animation techniques. And Mayas rendering is bar none when couples with the latest integration of Maya Software (very powerful realistic rendering), Maya Hardware (rendering right off of your video card), Maya Vector (RAViX Vector Rendering technology by Electric Rain Software), and Mental Ray (photorealistic rendering for still shots).

All of Doom3s models that have been animated were created in Maya. And its definitly not a bad start by any means whatsoever.