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!
Kittysplit - The easiest way of sharing costs with a group of friends
Verse Groups - Group expenses and payments, simplified.
SplittyPie - Create event, add users and their expenses.
Splitser - Splitser is the app for tracking, calculating and settling group expenses. ✓ Payment App ✓ Group Expenses ✓ Spend app
WieBetaaltWat - With WieBetaaltWat you can manage a list with your shared expenses.