Miku Miku Dance!

MikuMikuDance (commonly abbreviated to MMD) is a freeware animation program that lets users animate and create computer-animated films, originally produced for the Japanese Vocaloid Hatsune Miku, the first member of the Character Vocal series created by Crypton Future Media. The program itself was programmed by Yu Higuchi (HiguchiM) and has gone through significant upgrades since its creation. Its production was made as part of the VOCALOID Promotion Video Project