"EXIT TUNES PRESENTS Vocalogenesis" is a compilation album by EXIT TUNES. It consist of some of the notable tracks sung by Vocaloids such as Genjitsutouhi-P's Rolling Girl, Owata-P's Paradichlorobenzene, yuukiss's Nostalogic, and more. Vocalogenesis was the first Vocaloid album to top the charts. It is also the first in EXIT TUNES'S "Vocalo" series to feature other Vocaloids besides Miku on the cover. 
It is purchasable from Amazon, and their official website can be seen here.