The best QR Code Reader alternative to ZXing is ZBar bar code reader, which is both free and Open Source. If that doesn't work for you, our users have ranked six alternatives to ZXing, but unfortunately only two of them are QR Code Readers.
ZBar Bar Code Reader is an open source software suite for reading bar codes from various sources, such as video streams, image files and raw intensity sensors. It supports EAN-13/UPC-A, UPC-E, EAN-8, Code 128, Code 93, Code 39, Codabar, Interleaved 2 of 5, QR Code and SQ Code.
Dynamsoft Barcode Reader is a high-performance Barcode Scanner SDK for 1D/2D code decoding from video or images. It is fast and highly accurate, capable of reading difficult, damaged, or obscured codes. APIs support web, mobile, & server/desktop (C++, .NET, Java, Python, etc.) integration.
Brazil
Canada