Beehive - An open source IFTTT powered by Go's templating engine
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
eCasework - Case management & CRM for representatives and their staff
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.
Zapier - Connect the apps you use everyday to automate your work and be more productive. 1000+ apps and easy integrations - get started in minutes.
Braintree - An all-in-one solution to accept, process, and split payments in your mobile app or online - from small business to large enterprise.