A simple non-sweetened whipped cream can be made with just heavy cream in a stand-up mixer. This can be used for mousse or cappuccino.
Overwhip it, and you'll have unsalted butter and buttermilk, a great way to produce these ingredients without going to the store.
You can sweeten and flavor it. This explores those options.
Joe's Italian whipped cream includes vanilla, nutmeg and salt @ 7min. He uses vanilla syrup, which is sweetened.
General rule: 1 tablespoon powder sugar to 1 pint heavy cream.