Barcode & QR Code Scanner - A free app which allow to read and generate barcodes for Android.
Kaywa QR Code - Kaywa QR Code is a QR-Code Generator.
QR Droid - QR Droid Zapper
Zint Barcode Generator - A barcode encoding library supporting over 50 symbologies.
QuickMark - QuickMark makes everything possible.
qurify - Online QR Code generator with some advanced settings and print queue.