qurify - Online QR Code generator with some advanced settings and print queue.
QR.io - Generate fully customized QR Codes, with color shape & logo
ZXing Project QR Code Generator - Generate QR Codes.
VisualCode - QR codes for everything
Kaywa QR Code - Kaywa QR Code is a QR-Code Generator.
QR Code Payments - Cashless transactions for your business