I freeze a lot of meals when I can. I just dont have time to be cooking during the week but I still want to eat healthy meals and save money by not buying take-away. Here is a list of things that I do quite regularly.

Chilli con carne
Good ol spag bog & pasta (I even freeze pasta, I freeze everything, including the cheese on top so all I have to do is nuke it in the microwave)
Stir-fry (vegies & meat)
Tuna pasta bake
Stews
Soups - vegie, minestrone, leak & potato

Really, I reckon you can freeze just about anything. My standby for fast freezer food for when I cant be bothered cooking is fishfingers. I whack them into toast, add mayo and lettuce and reckon it tastes just like a McFish burger!