RFDUMP.org
If you are running Windows, or like to test it, you can download a live-image from a couple of mirrors.
You need VMWare 5.0 if you do not have a VMWare license you can run this live-Image by useing the free VMWare player for Windows or Linux.
The host operating system must provide the guest OS a serial port to access to the RFID reader hardware, you need to connect this reader from your host PC to the guest image, or it WILL NOT WORK AT ALL.