Here a list of Voicebanks that I found good quality to use. I may Find more in the future. so check this if you want. 
(this is just my opinion on voicebank choice ok? everyone have they own likes.)

Voicebank That I Reccomend (myopinon...Ok?)

GUESS WHO I'M BRINGING BACK, AND IS FINALLY FINISHED!!

Art for the song will be added once I get some done.

Here's Akihiro Utaiji's ACT 3/REBOOT bank! Last minute VCV parts have been added, and are used in this cover!


UST: Pandamo-nium
Song: Minato-p
UTAU: Akihiro Utaiji

DL:https://www.dropbox.com/s/jgfo8h0tam3o687/Akihiro%20Utaiji%20REBOOT.zip?dl=0

He really doesn't have a proper usage clause, as long as you don't claim his bank as your own.

【UTAU RELEASE】RIP=RELEASE【歌維持大畠 REBOOT】

well there it is

vb dl and credit : https://www.youtube.com/watch?v=M3QAIJ43fx0

[ UTAU VCV RELEASE ] kimagure mercy [ Akemi kinko ]

Original 平日（くもり） sunzriver
UST yesi-chan
VB ORIGAMI-I dizzle

DL　https://drive.google.com/file/d/0B0GyWG9Z6hF0WkM5NkVlbTVOdWM/view?usp=sharing&resourcekey=0-WIqxtXatoC_LGKISYT9U-w


Long time no see.
I write ORIGAMI-I and it is ORGAMI.

I tried to record E4CV to commemorate the long time.

It's a murmuring CV.
I imaged the drizzle and recorded it.

Also includes VCV of vowel and breath and humming.
BPM 100 one beat CV. So long tone is not very good.
Please use long vowels.
Aliases are "あL" and "a L".
There is "i <" as an infinite variety.

Copyright free
There is nothing you should not do.
Please try to use it freely.

UTAU Cover + VB /// weekday (cloudy) /// ORIGAMI - I

Song: Yuyoyuppe
UST: 混乱-P

The fellow who made this UST is a genius, and there is no way I can ever reproduce whatever they mixed from it. ( ; v; )

But that aside, I’m super happy to say that Tsux’s CVVC is finally done and ready to be released for real~! Not to mention, I can reveal that the voicebank will now go by the name of XANADU.

Why? I dunno, I picked the name because it sounded vast. ^^;

As I’ll state in the Release Video, this voicebank contains three voice types: Normal (Default), ASTRAL Z (Soft), and CATHARSIS X (Loud), the latter two used by adding a Suffix to the end of each sound.

ASTRAL Z= Add “_Z” after a sound. (eg: “あ_Z”)
CATHARSIS X= Add “_X” after a sound. (eg: “あ_X”)

I hoped to try to use each set as best I could in this cover, so you should be able to hear and/or discern each one when listening.

Once again, I’m very thankful to @CyberneticEden for helping me fix and redo the oto’s, because I am a boober who didn’t know what she was doing at first! I would have been lost without them.

So to stop myself, here be another new voicebank for Tsux.
I can’t believe she’s grown so much since her first CV bank, here’s to more progress in the future!

VB: http://www.mediafire.com/file/b2ud98tpfnp1o1r/Tsux+Namine+XANADU.zip

Youtube Version: https://www.youtube.com/watch?v=AwF8cXtL5pI

UTAU

[UTAU Release] You and Beautiful World [Tsux Namine XANADU] +VB

Song: GIRL -Side A-
Off vocal by YunYunSae=www.youtube.com/watch?v=nKmkZ-I2jgs 
song by Daoko and Kojima Hideya 
ust by AshitaTsukiloid
Tomoko's Wiki page: http://utau.wiki/utau:tomoko-yazawa
VB DL: https://www.mediafire.com/?32km11idou1fi5a
If you draw or use her let me know!!
Her partner will be released shortly I need to finish her art and tweak some voice settings before I do that tho B)
For now I hope you enjoy Tomoko!!

【UTAU RELEASE】GIRL -Side A- 【矢沢智子】+ VB

Hello am releasing my sweet daughter Aya! She's a Tripitch VCV with some extras, hope you like her~

~**~
▼ Full demo reel + VB dl: 
https://www.youtube.com/watch?v=Jo1WEIa5wk0&feature=youtu.be

【UTAU VB Release】 星野アヤ + YT

Hello! I make Utau covers sometimes and I make videos! 

This is mostly just my work space for WIPs and stuff but I check back here every so often to find nice music so feel free to shoot me a message! 

I am the creator of Shimizu Yukito and the Kobayashi Fuyuloids!

【UTAU VB Release】星野アヤ + YT

FuyuShinju

【UTAU VB Release】 星野アヤ + YT

FuyuShinju

【UTAU VB Release】星野アヤ + YT