QR Code Generator For Developers - A quick API to generate QR codes in your apps
Zelle - Zelle is a fast, safe and easy way to send money in minutes to your friends and family.
Link to QR - Free beautiful QR codes
Lydia - Lydia lets you use your card whatever you need to pay, even a friend.
QR Code Generator by Logaster - QR code for your business within seconds
PaymentSpring - The all-in-one, developer-driven payment gateway