Cash App - The easy way to send, spend, bank, and invest.
moltin - Inventory, cart, checkout, payments & more through a simple API
Facebook Pay - Send money to your friends via Messenger
Commerce.js - Rapidly create eCommerce experiences on web and mobile
PayPal.Me - Request money using your own personalized URL.
Shopify - Shopify is a powerful ecommerce platform that includes everything you need to create an online store and sell online. Try it free for 14 days.