Apache ActiveMQ is an open source messaging and integration patterns server. ActiveMQ is fast and supports many cross-language clients and protocols, and it comes with easy-to-use enterprise integration patterns and many advanced features. ActiveMQ fully supports JMS 1.1 and J2EE 1.4 and is released under the Apache 2.0 License. ActiveMQ is available for download from http://activemq.apache.org/ .
The main distinguishing feature of ActiveMQ is its support for a variety of cross-language clients and protocols including Java, C, C++, C#, Ruby, Perl, Python, ...
