Google Pay - Make secure payments right through your Android device.
Future - Calendar events around the clock
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
Event Calendar App - A simple, easy to manage, way of displaying events
AirPay - Integrate all payment channels via one single API
GetStream.io - APIs for the development of scalable newsfeeds and chat applications.