Kaywa QR Code - Kaywa QR Code is a QR-Code Generator.
qurify - Online QR Code generator with some advanced settings and print queue.
ZXing Project QR Code Generator - Generate QR Codes.
Scanova.io - QR code generator, designer, and campaign management tool.
GNU-Barcode - GNU Barcode is a tool to convert text strings to printed bars.
OnBarcode Barcode Generator - Barcode Generator & Reader for Java, .NET, C#, ASP.NET, VB.