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!
Splittable - Shared living made simple
Splittr - Splittr helps you to split group expenses and is so easy to use.
EquiTable - Split the bill fairly
Splid - Splid helps friends manage their money.
Dinngo - Splitting payments the fun and easy way