Auth0 Token Vault handles secure token storage, exchange, and refresh for external providers so you don't have to build it yourself.
Rolling your own OAuth token storage can be a security liability. Token Vault securely stores access and refresh tokens from federated providers and handles exchange and renewal automatically. Connected accounts, refresh exchange, and privileged worker flows included.
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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.
NFC is a scalable, distributed chat server and client implemented in Java. Notable features include built in load balancing and HTTP-tunneling support. Using the load balancing, a distributed network of servers can be formed, similar to an IRC network.