String cheese is a great source of protein and is very filling. I tend to buy the "light" string cheese also because it is also lower in fat. It isn't as stringy as regular string cheese but it's still good tasting.
Dannon Light& Fit is my absolute favorite yogurt. It has no fat and has no sugar added (uses some splenda) so it only contains 60 calories. My favorite flavor is blueberry.
I have a bowl of Uncle Same cereal almost everyday. It's made with whole grains and flax seed. It has 10g of fiber a serving so it leaves me full for hours. It can be found at Trader Joe's (cheapest) and Albertson's.
These fudge bars are great! Depending one what brand you buy, they only have 60-90 calories a bar because they are sweetened with splenda. Have I mentioned how much I love splenda?
What are some of your healthy foods or guilt free snacks?