Open Message Queue
Open Message Queue is an open-source
message-oriented middleware project by Eclipse Foundation that implements the Java [Message Service] 3.1 API. It is the default JMS provider integrated into GlassFish.
In addition to support for the JMS API, OpenMQ provides additional enterprise features including clustering for scalability and high availability, a C API, and a full JMX administration API. It also includes an implementation of the Jakarta Connectors called the JMSRA, that allows OpenMQ to be used by a Jakarta EE compliant application server.