This is probably not a good idea for many, but a few salted peanuts seems to help me when I am hungry late at night. I know some people are allergic to peanuts and others will eat too many. But I just eat a small amount and drink some diet green tea or a diet soft drink and it stops my hunger for a while.

Buffalo jerky

3oz can of tuna and celery or 3 whole grain crackers. Can of Kipper snacks. Fish may have more fat but it is the good fat and the high protein will keep you full longer

I'm a big jerky fan. Beef, turkey, ostrich, salmon... whatever. Also dairy, especially cheese. Those little laughing cow cheese triangles have 35 or 50 cals and are lovely w/o a cracker or bread. Also the baby bells are somewhere around 75 calories. I eat a lot of 1% cottage cheese. Often with dices veggies or sliced fruit.

After workouts I rely on muscle milk shakes. But good old chocolate milk is about as good. I never thought I would recommend "plastic food" like protein shakes, but they definitely have their place.

Another snack that is pretty available, but a little pricier is shrimp. We have lots of options here in Southern Calif. Cooked frozen or fresh. Raw frozen or thawed. Personally I'm a bit of snob and insist on wild caught - but that's me.

I use a whey protein shake when I need something to sustain me. I will make them up from the powder and take it to the office. 120 calories with water , more with 1% milk. Helps to make up for having to have a late meal and often I'll find I'm not really very hungry when I get time for dinner.