★Song in the Moonlight★: 2009

So, let's start with this =]
First one:
Utsu-P
Utsu-P's works have characteristics with Miku's shouting and a heavy sound of guitar. In addition, his works are said to be like the songs of children of early teens who are overreaching themselves. He mostly uses Hagane Miku.

(Original title)
"【初音ミク】　DIARRHEA　【オリジナル】"
([Hatsune Miku] DIARRHEA [Original])

Go on, i know you're laughing with the title, i laughed too when i saw it xD

(Original title)
"【初音ミク】　骸Attack!!　【オリジナル】"
([Hatsune Miku] The corpse Attack!! [Original])

Zim's guitar part is just awesome

【初音ミク】　ダイベン　【オリジナル】

Probably, the best known one

Second:
Machigeriita-P (マチゲリータＰ)

Machigeriita-P is an author who is famous for being good at horror music. He is active from the early days of Vocaloid movement, and there are many his fans.

(Original title)
"【ミクオリジナル曲】崩壊歌姫 -disruptive diva-【ProjectDIVAac応募曲】"
([Miku Original song] disruptive diva [ProjectDIVAac entry song])

I just love this song :3

(Original title)
"【鏡音リンオリジナル】桜花繚乱(生ギターver)【和風ソング】"
([Kagamine Rin Original] The profusion of cherry blossoms (Real guitar ver.) [Japanese-style song])

This one is just awesome too X)

(Original title)
"【初音ミク・鏡音リン・レン】暗い森のサーカス【不気味ワルツ】"
([Hatsune Miku, Kagamine Rin, Len] Dark Woods Circus [Weird Waltz])

If you don't know this one, you can't be called a true Vocaloid fan xD

Third:
AVTechNo (Momo'n'ga-Jump!)

AVTechNO (Momo'n'ga-Jump!) is good at producing techno and electronica music. He continues producing works at a very fast pace since his debut of Dec.2008. He has his own channel of YouTube as "AVTechNO". However, there are less works uploaded than NicoNicoDouga.

Kagamine Rin - Noiz are Nel - VOCALOID