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!
Evenfy - A free tool to manage household IOUs with roommates, split bills and track group expenses so that everyone gets paid back. On the web, iPhone, and Android.
/Tab - The simple way to split a bill among friends.
Splid - Splid helps friends manage their money.
EquiTable - Split the bill fairly
Dinngo - Splitting payments the fun and easy way