RabbitMQ

Advanced Messaging Queuing Protocol (AMQP) is an open standard for passing business messages between applications or organizations. This protocol is used to connect systems, provide business processes with the information they require, and reliably transmit instructions to achieve the goals of applications. 

With this connector, you can send messages to or receive messages from an AMQP broker queue, as well as, subscribe to messages from an AMQP broker queue.