Barcode & QR Code Scanner - A free app which allow to read and generate barcodes for Android.
qurify - Online QR Code generator with some advanced settings and print queue.
QR Droid - QR Droid Zapper
Kaywa QR Code - Kaywa QR Code is a QR-Code Generator.
QuickMark - QuickMark makes everything possible.
ZXing Project QR Code Generator - Generate QR Codes.