SimpleFunnel - Collect payments without writing code (Stripe & PayPal)
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!
EquiTable - Split the bill fairly
/Tab - The simple way to split a bill among friends.
Dinngo - Splitting payments the fun and easy way
Billplz - Simple cash solution to send bills and collect payments.