I have Vocaloids, but I haven't used them much because I don't know Japanese. Would like to be added to the list :)
Some cringe-worthy samples:
http://www.newgrounds.com/audio/listen/578781
http://www.newgrounds.com/audio/listen/572071
http://www.newgrounds.com/audio/listen/576615
Great list, btw. Definitely bookmarked for future reference :D
FeliciaValenti
Hi there! I'm a female vocalist centering more on orchestral/operatic sounds, but I can also do various styles depending. Can do English, Italian, French and German comfortably as well. Would you be able to add me to the list? Thank you! :)
Samples:
http://www.newgrounds.com/audio/listen/680507
http://www.newgrounds.com/audio/listen/671445
https://soundcloud.com/felimimi/aria-from-the-elixir-of-love
Troisnyx
I will do. Thank you very much for coming forward! <3