Classy - Expressive, flexible, and powerful stylesheets for native iOS apps
Cash App - The easy way to send, spend, bank, and invest.
Little Green Light - Illuminating Data. Advancing Nonprofits.
Facebook Pay - Send money to your friends via Messenger
Agilon One - Agilon One is a Nonprofit CRM software solution that connects and gathers information on constituents.
PayPal.Me - Request money using your own personalized URL.