You must be looking for some quick kegging recipes
I have some quick ones for a sarsaprilla, coconut lime, and ginger ale. All very easy with stuff from the grocery (aside from sarsaprilla root and wintergreen leaves, check your local health food store).
The coconut lime has always been a huge hit at all the gatherings I've taken it to. Inverting the sugar is optional, but it does give better sweetness for the amount of sugar going in.