ZXing - Barcode Scanner for Android
QR Droid - QR Droid Zapper
Binary Eye - Binary Eye is a Free Open Source barcode reader/scanner and generator.
ConnectUpz - Helping service businesses to connect and grow your customer base by becoming part of of a larger ecosystem.
ZBar bar code reader - ZBar bar code reader
Barcode & QR Code Scanner - A free app which allow to read and generate barcodes for Android.