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 the most popular and powerful open source messaging and Integration Patterns server.
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. Apache ActiveMQ is released under the Apache 2.0 License
Grab yourself a Download, try our Getting Started Guide, surf our FAQ or start Contributing and join us on our Discussion Forums.