Kittysplit - The easiest way of sharing costs with a group of friends
Tricount - Manage and share expenses with friends
SplittyPie - Create event, add users and their expenses.
WieBetaaltWat - With WieBetaaltWat you can manage a list with your shared expenses.
ihatemoney - Manage your shared expenses, easily
Splittr - Splittr helps you to split group expenses and is so easy to use.