Can someone recommend me some VOC@LOID songs (good ones)

I know you said no remixes, but one of my favourite Vocaloid songs is a remix. It's Love is War NTMG MIX by baker featuring Miku.

now to original songs. format is song - producer; singer.

imperfect flower - SCL Project; Gakupo V3
Astral Domination - yamaji; Rin and Len Append
Immoral Memories ~The Lost Memory~ - SCL Project; Gakupo, Kaito and Len
Scissorhands - Nem; Miku
Escape the Princess - HannyaG; Miku and Gumi (tw because it seems like the whole song is about miku raping gumi, but it's still a very good listen)
dreamin' flyer - CALFO; Miriam and Meiko (only suggesting for miriam's part, because sakine config sounds so ugh here)
Always and Forever - PeperonP; Rin and Gumi
Twin Colours - ShigotoshiteP; Meiko and Luka
What does it mean? - Luka (i don't know who the producer is ;n;)
Sheol - yasuke; Rin
love.Game - TaaP; Miku (searching for "love.game ミク" on google is the easiest way to find it.)
Supernova - fullkawaP; miki
Goddess of Spring - GeirorinP; Rin and miki (nico only song. the japanese name is 佐保姫. just listen on nico sound if you don't care about the video; you can find it by searching on google.)
twinkle - SHERRY; Ritsu (not vocaloid, utau, but still nice?)
Lift Off! - FayeP; Gumi

and i'm too lazy to list anything else so sorry. those are some of my favourite vocaloid songs though, so enjoy.

New vocaloid songs come out every day so it is a bit much to keep up with, however if you want new, good vocaloid songs I would recommend creating an account on Nico Nico Douga, they finally released the English version so its much nicer to use link you need to create an account to watch videos. I would give you some videos to watch but as you said there are way to many and most of them are good so really I find the best thing to do is to get lost on youtube, just find a vid and just keep clicking on the related vid section after you watch each one. If you keep clicking vocaloid vids eventually all of the recommended vids will have Japanese titles because they have all been directly uploaded from nico nico douga, while some of these song are not very well known some of them are still very good. but I can give you some songs
1, 2 fanclub
Deep-Sea city underground
Remote Controller
complete evil lolita complex
Dragon Rising
Wave
Starlight Keeper
Eternity
Revolution Green is the Enemy
Rise and Fall of Physic Girl
Bonus Stage
Gensouka
ReBIRTH
Ice Sculptures
The wolf that fell in love with little red riding hood
Candy Physiologist
Soleil
Phantom thieves Peter and Jenny
Well I could go on but then We'd be here all day so have fun!

I like Gumi doing CANDY CANDY
Also Hatsune Miku does a few I like mainly Love is War, World is Mine, and Melt. hope that helps :)

Have some really neat ones!~
This one is Macaron, by Miku Hatsune.

Here are some more fun ones to listen to:
link -Miku Hatsune

link
Sobani Itekuretane (Remake) - Hatsune Miku

link
Endless- GUMI

link
Tori No Uta- Lily

Here are some of my favorites made by Domino's Japan ft. Hatsune Miku:

Luv4Night : link
Wish I Could Deliver My Love: link
Luv Luva Baby:link

Another one from Ryo Supercell ft Hatsune Miku: Black Rock Shooter: link

And a new one that came this 2012, Livetune Ft. Hatsune Miku: Tell Your World: link

world's end dancehall,black rock shooter,world is mine,magnet,stay with me,nyanyanyanyanyanya,DYE,megane,odds and ends,fire flower,acute,freely tommorow,weekender girl,remote control,madness of miss duke venomania(luka's version)Sadistic.music factory and just eb friends

Rolling Girl by Hatsune Miku
Two Faced lovers by Miku and the Nekomura Iroha version
Bad Apple by Touhou
Sorry for being a closet otaku by Gumi
Strobe light by Miku
Chain Girl by Miku
Secret Police by Miku
Kocchie Muite Baby by Miku
Coward Mont Blanc by Gumi
Dancing Samurai by Gakupo
One Night Disco by Luka
and thats all i can think of.

A Clingy Boy Sticking for 15 Years. It's really touching when you climb up the years. When you get to the 15th, it'll make you go all... :(