RabbitMQ - Robust messaging for applications

RabbitMQ is a messaging broker - an intermediary for messaging. It gives your applications a common platform to send and receive messages, and your messages a safe place to live until received. It features include reliability, high availability, Clustering and Federation. RabbitMQ ships with an easy-to use management UI that allows you to monitor and control every aspect of your message broker. There are RabbitMQ clients for almost any language you can think of.