((Take note that a Vocaloid is the general term for a singing synthesizer.
Megpoid (not Megapoid xD) is the name of the Vocaloid2 singing synthesizer application produced by INTERNET Co.,Ltd.
Gumi is the name of the mascot of this programme.
Just thought I’d clear things up a little! Megpoid is a quite complicated Vocaloid package, haha.))