NFCProxy is a an Android app that lets you proxy transactions between an RFID credit card and a reader. The saved transactions can be replayed to skim credit cards or the RFID credit card can be replayed at a POS terminal.
NFCProxy can also be useful for protocol analysis to learn about the underlying communication protocol.
In order to replay credit cards to a reader you MUST install a special version of CyanogenMod.
Java-RFID is a Java programming library for RFID. Its goal is to create an RFID kit-agnostic API ala JDBC. Thus, programmers will write the same code to communicate with any RFID kit. It has been tested with Texas Instruments and Microchip RFID kits.
The objective of this project is to create an implementation of the EPCglobal reader protocol, for use by application developers, that will provide a uniform interface to today's major RFID reader platforms. See http://www.accada.org for more details.