SimpleFunnel - Collect payments without writing code (Stripe & PayPal)
Splittable - Shared living made simple
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!
/Tab - The simple way to split a bill among friends.
Roomr - Discover great people to live with