Another question:
Let's suppose, we have a low-polygonal model and we have
a motion capture file. For example, Poser can generate walk
and run animation. What program must we have to apply motion-capture
data to low-poly model ? (Standard mocap files are in
text format with skeleton structure, time and angles data)
Character Shop can animate models,
but it's contains only "conter-strike" style animation set
without possibility to import mocap files. Moreover, for
animation with Character Shop model must be properly scaled
first. Author of Character Shop writes, that it's a big
trouble to mess with mocap files because of these files
can have different skeleton stucture. But Poser can import
motion capture files very well, at least for human models

There are not so many different simple skeleton structures,
if we don't want to animate complex hi-poly models with real
human-like structure (fingers and so on).
(I don't expect answer: "Use 3DS Max + plugins for animation")