Splitwise - Splitwise is a free tool for friends and roommates to track bills and other shared expenses, so that everyone gets paid back. On the web, iPhone, and Android!
/Tab - The simple way to split a bill among friends.
Kittysplit - The easiest way of sharing costs with a group of friends
ihatemoney - Manage your shared expenses, easily
Splitit - Splitit is a solution that enables consumers to pay for their Retail or Web purchases using their existing credit cards and divide the total cost across as many interest-free payments as they choose, without completing a credit application or qualif…
SplittyPie - Create event, add users and their expenses.