PayPal - PayPal is the faster, safer way to pay online without sharing financial details, send and receive money or accept credit and debit cards as a seller
Tricount - Manage and share expenses with friends
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.
Kittysplit - The easiest way of sharing costs with a group of friends
Braintree - An all-in-one solution to accept, process, and split payments in your mobile app or online - from small business to large enterprise.
ihatemoney - Manage your shared expenses, easily