BillMonk

Whose turn is it to pay for pizza? How much do you I owe you for rent? No idea? Let BillMonk help you keep track of money that you've borrowed or loaned, and eliminate the awkwardness of mixing money and friends.

Use it to keep track of IOUs, and shared bills like beer, food, or utilities. Let us deal with the pain of money math and reminders, so you can concentrate on the beer and not who paid for it.