Also released today for Miku Day (3/9) is a new Hatsune Miku V4X model by REMmaple for MikuMikuDance! The model beautifully recreates every detail of the original design by iXima, and is available for free download from the link below. Be sure to follow the usage guidelines outlined in the ReadMe file!
Model Download: http://seiga.nicovideo.jp/seiga/im6541444
You can also follow REMmaple at these pages!