libzmq-dev 2.1.11-1ubuntu1 (i386 binary) in ubuntu precise

 The 0MQ lightweight messaging kernel is a library which extends the
 standard socket interfaces with features traditionally provided by
 specialised messaging middleware products. 0MQ sockets provide an
 abstraction of asynchronous message queues, multiple messaging
 patterns, message filtering (subscriptions), seamless access to
 multiple transport protocols and more.
 .
 This package contains the ZeroMQ development libraries and header
 files.