Cuppa Soup
Low Fat Greek Yogurt, mixed with cucumber, garlic and mint for a dip. And dip in Veg such as celery, carrot sticks, Mangetout. Eating celery burns off more calories than you are consuming

Peppers stuffed with mushroom rice.
Tin of plum tomatoes and throw in some basil - heat up and eat.
If you miss sweets - freeze some grapes and once frozen you can suck on them

ETA: You will be hard pressed to find nearly no calorie snacks..only low calorie. Unless you plan on just drinking water
