ZXing or “Zebra Crossing” is an open source multi-format 1D/2D barcode image processing library that’s been implemented in Java, and also comes with ports to other languages. It currently supports the following formats:
UPC-A and UPC-E
EAN-8 and EAN-13
Code 39
Code 93
Code 128
ITF
Codabar
RSS-14 (all variants)
RSS Expanded (most variants)
QR Code
Data Matrix
Aztec ('beta' quality)
PDF 417 ('alpha' quality)
MaxiCode
ZXing is made up of several modules, including a core image decoding library, JavaSE-specific client code, and Android client Barcode Scanner. ...
PyUPC-EAN is a barcode library/module for Python. It supports the barcode formats upc-e, upc-a, ean-13, ean-8, ean-2, ean-5, itf14, codabar, code11, code39, code93, and msi.