BarCodeWiz OnLabel - Barcode and QR Code and Barcode
Zint Barcode Generator - A barcode encoding library supporting over 50 symbologies.
LabelJoy - Labeljoy is another professional barcode software that generates more than 18 different kinds of barcodes, import barcode from the database and automatic checksum calculation.
Offline QR Code Generator - A browser add-on that allows you to quickly generate a QR code offline with the URL of the open tab...
Manatee Works - Manatee Works offers barcode decoding solutions.
QtQR - A Qt GUI (front-end) for python-qrtools that makes creating and decoding QR codes easy.