If you want to hear a danish song with a lot of autotune, you can just search for "Nick & Jay - Endnu en" on youtube.
I haven't tried GSnap, but Antares isn't as accessible as I could wish. It works, but it isn't the kind of autotune I want to use.
You can also try Melodyne, I don't know if it is accessible, but you can hear what it can do by searching for "Symphony of Science" on youtube.
Best regards
Alex
To see a world in a grain of sand, and a heaven in a wild flower.
Hold infinity in the palm of your hand, and eternity in an hour.
William Blake - Auguries of Innocence, line 1 to 4