ActiveMQ is a fast open source JMS 1.1 provider and Message Fabric supporting clustering, peer networks, discovery, TCP, SSL, multicast, persistence, XA and integrates seamlessly into J2EE 1.4 containers, light weight containers and any Java application. ActiveMQ is released under the Apache 2.0 Licence
NEW SITE UNDER CONSTRUCTION
We're currently in the process of updating the Apache ActiveMQ website. The new website is currently under construction, the work in progress is staged here. The source code can be found here. We very much welcome contributions :).
Apache ActiveMQ is fast, supports many Cross Language Clients and Protocols, comes with easy to use Enterprise Integration Patterns and many advanced features while fully supporting JMS 1.1 and J2EE 1.4