MX4J

MX4J is a project to create an open-source implementation of Java Management Extensions (JMX). The JMX specification is a Java Specification Request (see JSR 003) currently in maintenance release 1.2; the new JSR 160 has been issued to address connectivity to a remote JMX agent. MX4J implements both JSR 3 and JSR 160.
The MX4J project goals can be simplified as:
Due to its simplicity, MX4J is widely adopted in open source projects like Jetty Server, Tomcat, Geronimo, Harmony, ObjectWeb JOnAS and many others.
Activity on MX4J project has now ceased.