About flavoring coffee

I am very much a black coffee person, that said, once in a while I wouldn't mind flavor of some sort in my coffee, I see these people with there French Vanilla, or cinnamon coffee creamer and I will admit I get a bit jealous.

I am working on getting in shape, other than round, and on a budget, so I have been toying with the idea of trying a protein powder or something similar as creamer.

I was hoping I could get some alternative ideas for coffee creamer here. I am looking for low calorie, and ideally something with protein. Does anyone have an idea?