1.2. Apache Qpid
Apache Qpid is a cross-platform Enterprise Messaging system that implements the Advanced Messaging Queue Protocol (AMQP). It is developed as an Apache Software Foundation open source project.
With Apache Qpid we strive to wrap an intuitive and easy to use messaging API around the AMQP model to handle as much of the complexity as possible (while still allowing you access to the nuts and bolts when you really need it), so that you can build highly performant and scalable applications with integrated messaging quickly and easily.