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!
SpendGroup - Split bills and expenses with friends, roommates and family
/Tab - The simple way to split a bill among friends.
BitSplit - Split expenses - Simplest app to split bills
Dinngo - Splitting payments the fun and easy way
Qrvey - Embedded Analytics built exclusively for SaaS applications.