JOnAS is a leading edge Open Source implementation by OW2 of the Java EE specification. The stable versions are J2EE 1.4 certified. The License used by JOnAS is the LGPL. http://wiki.jonas.objectweb.org/xwiki/bin/download/Main/Overview/jonas-5-schema.png It uses OsGi as its core. Wiki Site: http://wiki.jonas.objectweb.org/xwiki/bin/view/Main/WebHome