Low calorie dip and snack recipes?

I'm starting to think about what to make for Super Bowl Sunday, and since we, and most of our friends are all dieting, I'm looking for any low calorie veggie dips and appetizers.

I've looked in my cookbooks and all, but not many give the calorie counts so I'm not sure. Dieting is hard when there's a gathering planned, but I'd like for the whole group to stay on track somehow.

Thanks in advance for any recipes that you have to offer.

Joan