MikuMikuDance is a free 3DCG animation software.

Official site http://www.geocities.jp/higuchuu4/index_e.htm

MikuMikuDance Wiki
http://www.google.com/search?hl=en&q=What+is+MikuMikuDance&aq=f&oq=&aqi=g-sx1

mikumikudance wiki Basic Japanese-English Legal Terminologies