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A small and simple Java API to read and write NFC cards. It supports mifare cards and PN 532 chips. This library works with RS232.
More details: http://blog.sibvisions.com/2012/12/23/new-project-embedded-nfc/
...However, when desiring to use the extended features of the individual tags, the user is required to implement the tags binary protocol stack. This Project is an attempt to ease the workload of Developers desiring this type of Access, by providing a simple API for communicating With the tags.
Open NFC is an open source stack implementing the NFC functionnalities for many OSes. The Open NFC stack offers a comprehensive set of NFC API for Android, Linux and Windows Mobile.