Lots of possibilities.
What equipment do you have to cook with? Do you want to make everything in advance (which I would suggest as otherwise you won't get to enjoy the party).
different type of finger foods
I agree with both posts above, but I would also ask for some more information before any of us can really help. Are you looking for a full meal or just stuff to snack on? What is your experience level? What kind of things do you like? Where in the world are you? Unless you provide a bit more information we would be just shooting in the dark. You could get 100s ideas and none of those would work for you, for various reasons.