In case you are working on NFC and look for an implementation to test against, or to tinker with, have a look at nfcpy. The NFC implementation is entirely written in Python and works with a number of USB readers, like the RC-S380. It’s well documented, open-source, and includes tools and examples for some popular NFC use cases like smartposters, SNEP exchange over LLCP and  handover.

You can get nfcpy at https://launchpad.net/nfcpy

Documentation is available at http://nfcpy.readthedocs.org/en/latest/