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!
Cash App - The easy way to send, spend, bank, and invest.
Splittable - Shared living made simple
Facebook Pay - Send money to your friends via Messenger
EquiTable - Split the bill fairly
PayPal.Me - Request money using your own personalized URL.