Most international events as well as several leagues throughout Europe
As far as I know this ball is only used in the Italian League
"Star New Champion VB215-34"
I played with this ball during my short stint in Korea. Its a little heavier with a soft touch
"Gala Volleyball 5651"
When I played in Austria we used the Gala. Back then it was red and white with the formation of the old Mikasa...same as the paneling as the Star ball above. I'm not sure but I think they have converted to the new Mikasa.
If there are some other balls out there please let me know and I will add them to this post. Our sport is always changing and its nice to keep people up to date.