Apache Qpid (qpid)
Category: network-server, network-client
Programming language: C++, Java, C#, Perl, Python, Ruby
Apache Qpid implements the latest AMQP specification, the first open standard for enterprise messaging, and provides transaction management, queuing, distribution, security, management, clustering, federation and heterogeneous multi-platform support and a lot more.
Release: 0.14 (2012-01-26)