With Foamee you can keep track of who owes you and who you owe. Foamee is a part of Twitter, so you'll have to sign up with Twitter before you can use it. Then you can give virtual beer to your friends and get virtual beer from them.

When you owe someone a beer for something just follow the directions on the Foamee how to page and type the Foamee username and your friends username into your Twitter along with a message to your friend. When the debt is paid off you can redeem any beers you have owed to you by typing the redeem code into your Twitter.

Watch as the beers pile up in your Foamee pub. Always know who you owe and who owes you by checking your people's page.