Very Low, or Zero Cal Foods.

It has been mentioned numberous times, but it works - water. I personally drink at least one bottle of seltzer or sparkling mineral water a day. No calories, no sodium (in seltzer, minimal in mineral water). The seltzer also helped me overcome the whole soda thing.

I have found crunching on ice chips helps for when you aren't really hungry but you want to snack on something, they are crunchy and you can eat as many as you want without feeling guilty. I also really like the Extra Dessert Delights gum for when I'm trying to last until the next meal.

Take ice cube tray. Fill with water. Add a little sugar free squash if you like. Put a lolly stick in each section. Put in freezer. 0 calorie lollies.

You could also call it just an ice cube on a stick, but I like them.

Beef jerky. Fairly lean source of protein. And takes care of the craving for a salty snack. At least it does for me. Also, carrot and celery sticks with your favorite salsa. I dip those suckers like chips! Virtually no calories. If you wish, add me as a friend and you can scope out my food diary. I strongly suggest looking at the food diaries of your MFP friends because I get all sorts of great ideas off of them.

bump ..... good suggestions here. Want to come back later and get some more ideas.

Most everyone has said alot of the things I use to munch on already... the biggest thing for me though is that I've found if I'm eating enough vegetables and protein through the day I'm not really hungry when night time hits. After dinner always used to be my witching hour where I would snack like crazy... the last two weeks I've been eating alot cleaner than I've ever eaten in my life and I'm not finding the late night hunger/snack attack to be as much of an issue...

even with that being said though my taste buds sometimes want something even if my tummy doesn't... Walmart and blue diamond have a dark cocoa roasted almond that has been satisfying this for me... it is about 150 cal a serving and I know me. If I had the bag it would all be gone in a matter of minutes... I try to curb this by pre measuring out my portions... I have small snack cups/bags and when an item comes in that I know I would over eat on I set out a number of serving sizes that I can just grab... and with the almonds I find if I eat one at a time... that small 1/4 c portion is enough

good luck and I hope you find something that works for you

I bought a huge 5 pound bag of green beans that I've been roasting and eating as "fries." They're really low calorie and taste like whatever you season them with. Usually I just lightly spray them with Pam and coat with some salt, pepper, and garlic powder, then pop them in the oven at 400 degrees for 10-15 minutes, stir and bake them 7-10 more minutes. So good and easily under 100 calories for a whole bunch of them. Roasted broccoli and caulifower are also really tasty. I've also gotten the mini 100 calorie bags of popcorn before and they're pretty filling too.

Oh, and if it's late at night, I make some decaf coffee. It kinda curbs the desire for sweets... at least for me.

When I get the munchies (usually night ) I crunch on raw cranberries. They are in season right now. They are sour and sweet at the same time. They are in season right now and most stores carry Ocean Spray brand. I buy mine at Sam's Club : the 3lb bag costs less than $5.00. Throw a bag or two in the freezer to eat them as a frozen treat. Raw fresh cranberries last about a month in the 'fridge, and a year in the freezer. They are 30 calories per 1/2 cup ' 6 carbs, and 2g fiber. I keep a small bowl on the kitchen counter and at my desk and when I feel like snacking I just pop a few and feel satisfied. Lemon and lime squeezed in large glasses of ice water or unsweetened tea are great for you too!

Zero calorie would be water. That's all I know of.