Web Site: Foamee
Foamee leverages the Twitter service to notify someone when you owe them a beer. Of course, it can also be used in general for any I.O.Us or acknowledgement of good deeds. After you’ve paid your debt and bought someone their much deserved “beer”, you can mark it as “redeemed”. I suppose there are worse way to waste your time on the web 
So, if you are having trouble figuring out who owes what to who, this service might help you keep everything straight. By the way, you owe me a beer.
