Python application to scan DataMatrix barcodes using webcam. Uses libdmtx as backend decoder and pyGTK for display. Intended as a conference badge scanning application, but flexible enough to allow other applications.
Hey, Steffen, I'm with you! Free Software has a great value. So, I wanna to share my favorite barcode scanner software here. http://www.onbarcode.com/scanner/ (Data Matrix include) It works well and easy to use.
Took me not too long to get it running  with libdmtx  on Debian GNU/Linux. This is a professional looking tool for a jump-start into the otherwise quite pricy world of matrix code handling software. The visualization works great, even if the output of decoded content could be better then with python-virtkey. It's just annoying to get any input field on focus filled with that output too when doing a live demonstration creating the codes on-the-fly. Anyway, that's great value for free software, that certainly contains a lot of know-how in digital image processing, that you may not get even from any commercial product.  http://www.advogato.org/person/hasienda/diary/1.html  https://sourceforge.net/projects/libdmtx