I have worked with Jboss 2.4.4 and it is really great. Unfortunately I got some problems with Jboss JMS -service so I have to change it. Would would be the most suitable freeware/low cost JMS server to Jboss 2.4.4 ? full support to JMS 1.0.2b is needed. And how to change JMS server to Jboss 2.4.4 ?