Here is my own little thread that I'll probably post in by myself... Unless a miracle happens and one of you guys likes Vocaloid too.

To those who don't know what Vocaloid is, I'll explain it as well as I can. If you want more info look at the Vocaloid Wikia.
Vocaloid is a music program that takes a person's voice samples and allows you to manipulate them, making that "person" sing anything you want. Utauloids are fan-made, free versions that anyone can make and use in the Utau program, which is similar to Vocaloid. The most popular Vocaloid is Hatsune Miku, though there are many others, most of which sing only well in Japanese, which is why this list will mostly consist of Japanese songs. Some have "appends" or "extends," which are just slightly different voice samples to fit more kinds of songs, e.g. WHISPER Append just has them singing quietly and airily. I don't have songs for every Vocaloid because I don't like every single one (Gackpoid)... My favorite is Gumi, but because Miku is so popular, most of the songs will be of her.

I've been a fan of Vocaloid for many years, and I try to, when I have time, find new producers and music genres. Share whatever songs you know of please. :3 And for your informat

My playlists (infrequently updated):
All Vocaloids + group songs (contains all the songs of the other playlists + more)
Hatsune Miku
Megpoid Gumi
Kaito
Hiyama Kiyoteru
Megurine LukaKagamine Len
Kagamine Rin
Lily
SF-A2 Miki
Kaai Yuki
Meiko
Iroha Nekomura
VY1 Mizki

I may make playlists for each song Producer, because many producers have cool little series (like deadball-P and cosMo-P).