Here's some good, low cal foods. Some of these I try to eat when I'm in a bingey mood; lots of food for little calories. These are all good for the non-cooker.
:: Progresso garden vegetable soup, a can has 200 calories, it also comes in 50% less sodium.
:: 2 cups romaine lettuce, 1 medium apple (diced), 1 clementine (each segment halved). Packed full of fiber and vitamins, this salad comes to 125 calories. You can also use some 1 cal/spray dressing, and/or add low fat cottage cheese for protein and calcium at 90 calories per half cup.
:: 1 piece of whole wheat toast with 1 teaspoon each peanut butter and jam. (1 tsp. pb is 32, 1 tsp. jam is 17) Total calories depend on what kind of bread you use - for me this is 140 calories.
:: Air popped corn (not from a bag) - 3 tablespoons of corn makes about 3 cups popped = 130 calories. Popcorn is a whole grain, so it's pretty healthy. You can use butter flavored cooking spray and sprinkle on salt for no added calories. Other things I like on popcorn: garlic powder/salt, cinnamon, pepper.
:: String cheese, 80 calories per stick, low in fat -- and I can eat it slowly!
:: "Poor Man's Soup" (a personal creation) - boil 2 cups of water, add 7 diced baby carrots, 2 cups chopped spinach, and 1 vegetable bouillon cube. Entire pot has 85 calories.
:: 1 cup of plain yogurt with 1/2 cup of berries - 170 calories. Can add a packet of artificial sweetener or a dash of vanilla extract or cinnamon for extra flavor.