Breyers makes a fat free double churned french chocolate ice cream that has 90 calories per 1/2 cup. It tastes great. They make vanilla as well.
For a snack fix the baked cheetos are pretty good. 130 calories and 5 grams of fat for 34.
Also try the "I can't believe it's not butter" spray instead of butter or margarine 0 fat, 0 calories.
Good luck,
Kurt