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!
Dinngo - Splitting payments the fun and easy way
BitSplit - Split expenses - Simplest app to split bills
/Tab - The simple way to split a bill among friends.
Splitser - Splitser is the app for tracking, calculating and settling group expenses. ✓ Payment App ✓ Group Expenses ✓ Spend app
EquiTable - Split the bill fairly