Hagen Daz Banna Split, but, sadly, it appears they don't make it anymore. :cry:
Ben & Jerrys Chunky Monkey is great, too, but it has enough chocolate in it to be dangerous for me to eat.
Another one I can't seem to find is B&J's Schweddy Balls. I know it's only available between Thanksgiving and Christmas, but I haven't seen it in a couple of years.