Splittable - Shared living made simple
/Tab - The simple way to split a bill among friends.
EquiTable - Split the bill fairly
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!
Honeydue - The simplest way to manage money, together
Balance Pro - Manage Your Money & Track Your Spending