Splittable - Shared living made simple
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!
ihatemoney - Manage your shared expenses, easily
/Tab - The simple way to split a bill among friends.
Tricount - Manage and share expenses with friends
EquiTable - Split the bill fairly