MikuMikuDance
The model data has entered software.
It is software that moves the model data.

This animation is making of them the dance by software named MikuMikuDance.

In addition, animation for which MikuMikuDance is mainly used

MikuMikuDance is a freeware. This software corresponds to English.
let's try.
http://www.geocities.jp/higuchuu4/index_e.htm