http://zeromq.org
ZeroMQ \zero-em-queue\, \ØMQ\:
Ø Connect your code in any language, on any platform.
Ø Carries messages across inproc, IPC, TCP, TPIC, multicast.
Ø Smart patterns like pub-sub, push-pull, and router-dealer.
Ø High-speed asynchronous I/O engines, in a tiny library.
Ø Backed by a large and active open source community.
Ø Supports every modern language and platform.
Ø Build any architecture: centralized, distributed, small, or large.
Ø Free software with full commercial support.
官方介绍，也就是说这个算是一种通讯协议吗？