Like the title says, I'm looking for an inexpensive app or program that can catalogue both journal articles and books. I need something that has or can take input from an ISBN/QR/barcode scanner, and can also do in-line article annotation like Mendeley.
Background: I work at a very small consulting firm. We do IT, custom software, creative services (design and UXD) and user research (theory, strategy and testing). We're just starting to put together a research library, and we quite frankly don't have the money for high-powered library software.
I know I'm probably asking for a magical unicorn here, and if what I want doesn't exist, please tell me. I figured research professionals would have had the most need for something like this; any help you could throw my way would be much appreciated.