HandUp Gift Cards - Give directly to a homeless neighbor on the street

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.

Watsi Gift Cards - Give the gift of health to those in need

SuperPay - Get paid faster with your own custom payments page

The Groundwork - The API for building modern movements

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