What are some good vocaloid songs?

trust me, there are loads of Vocaloid songs. Here are just some of the many out there:

Miku Hatsune:

World is Mine; Joker; Last Night, Good Night; Melt; Magnet (duet with Luka); Po Pi Po; Romeo and Cinderella; Love is War; much more.

Rin Kagamine:

Meltdown; Daughter of Evil; Kokoro; Levan Polka; Fear Garden; Butterfly on Your Right Shoulder; I like you, i love you; Paper plane; I can take off my panties!; , and much more

Len Kagamine:

Servant of Evil; Looking for you in the sky; sadistic vampire; spice; prisoner; hot cocoa; a new millenium; the riddler who couldn't solve riddles, and a lot more

Luka Megurerine:

Just Be Friends

All vocaloids:

Alice of Human Sacrifice

hope this helped!