I used this free 2d IEC16022 datamatrix barcode generator to create my site logo - It even scans off my laptop screen. There's an online one-off generateor here http://prt-i61.fernuni-hagen.de/~bischoff/2d-barcode/ and it links to a page where you can download the source. I've hacked the source a bit and managed to get a basic Win32 version running that can produce png files from the command line.
I've been using 1D barcodes for several years while working at MCS and thought I'd see if 2d barcodes had much more to offer.
