Zint Barcode Generator - A barcode encoding library supporting over 50 symbologies.
bcWebCam - Scan barcodes and QR Codes with your computer web cam
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...
ZXing - Barcode Scanner for Android
QtQR - A Qt GUI (front-end) for python-qrtools that makes creating and decoding QR codes easy.
QuickMark - QuickMark makes everything possible.