VisualCode - QR codes for everything
Unlock - Monetize your content with a few lines of code
Link to QR - Free beautiful QR codes
HitPay - Send or receive money using a modern payments interface
QRCraft - Turn Boring QR Codes into Captivating Works of Art!
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.