I use mostly fish, seafood or chicken. Those just lend theselves best to butter, cream, onions, garlic, parsley etc. My youngest DD craves alfredo sauces and pasta.
You can freeze them but there will be some separation when they thaw. You would need to use them fo cooking in recipes where the cream isn't the star of the dish. It won't whip as nice either. Perfectly doable.
Alfredo sauce - holy smokes Italian alfredo is sooooo good and uses up a good amount of extra cream
Banana Ice Cream
Belgian Waffles
Pudding
Custard
Chowder
Cream of anything soup - broccoli, aparagus, potato, tomato
Creamed chicken over rustic thick thick bread
Mmmmm I love cream!