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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/
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.