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!
Stripe - Online payment processing for internet businesses. Stripe is a suite of payment APIs that powers commerce for online businesses of all sizes. Use Stripe’s payment platform to accept and process payments online for easy-to-use commerce solutions.
Splittable - Shared living made simple
SuperPay - Get paid faster with your own custom payments page
EquiTable - Split the bill fairly
Zelle - Zelle is a fast, safe and easy way to send money in minutes to your friends and family.