My choices would be:

Melons (any kind, love 'em all), apples (just slice 'em, great for
snacking), sliced tomatoes, pineapples, bananas.

Can't recommend these as a nutritional food, but once in a while, I
really like a few Rye Crisp crackers (not saltines, the brown one's),
dipped in applesauce. Those crackers are so crunchy.

Whatever your favorites, it's a real savvy idea to keep some of these
items around. Not to encourage in-between meal snacking, but just for
the odd time when the rest of the family is eating some "caloric hand
grenades", (high calorie snacks), and you want to have a satisfying
and OK snack, as well.

What foods do you favor, for snacking, and staying on the diet?