I have a ton on my Nokia 5800. My favorite is QuickMark because it has so many great features but damn, no BB version. Upcode should have a BB version but their site has been offline for a couple of days and I'm checking Kaywa now.
Ok, get Upcode at www.upcode.fi
. It doesn't have some of the neat features of QuickMark like the ability to add contacts, but it does 1D and 2D barcodes in many more formats than I have seen supported by any other reader.
Kaywa isn't supported on BB either.