GoLightly has a variety of Splenda sweetened sugar free candies. The Vanilla Caramels are 0g per serving, using hydrogenated starch hydrolysate as a base.
Be warned though that there are 31g per serving of the artificial sweeteners, which is a hefty amount for 5 pieces. If you eat all five, expect your intestines to let you know :)
It is VERY thick and chewy and is very grippy - this is definitely a candy for people with VERY secure teeth. Of course the more you gnaw at it the softer it becomes, and the flavors are quite rich. I didn't like the way it kept getting stuck to everything, but that's me. Others I've fed these too have also commented on the teeth-gumming effects.
Caramel fans will probably enjoy this quite a bit!
Lisa Shea's Library of Low Carb Books