ZeroMQ

high-performance Messaging library with a socket-style API. It provides a Message Queue, but unlike message-oriented middleware (MOM), a ØMQ system can run without a dedicated Message Broker. http://en.wikipedia.org/wiki/%C3%98MQ

http://www.zeromq.org/

Lots of language bindings including Python - http://www.zeromq.org/bindings:python


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