This is the official Payeezy iOS SDK to integrate payments, credit cards, and e-commerce solutions into Apple Pay. A PDF guide in GitHub published by Atul, the same writer of the SDK, demonstrates how to install, create payment tokens, and integrate with Apple Pay. Guide available at https://github.com/payeezy/payeezy_ios/blob/master/guide/payeezy_iOS_SDK042015.pdf
Play2Shop aims to be the "Ebates with Entertainment and Engagement." Play2Shop rewards gamers with points and pays shoppers with cash back that can both be used for discounts at over 1,000 retail partners. Additionally, the Play2Shop API enables game developers to join the Play2Shop community regardless of platform.
Billaway, a rewards program solutions provider for enterprises, has just announced the launch of the Billaway API which allows developers to integrate the Billaway platform into existing billpay and other product purchase systems.