OpenEJB is a simple, lightweight Enterprise JavaBeans (EJB) container and server. You can embed OpenEJB in your own applications, or in a Web application server like Tomcat, or run it as a standalone EJB server. It supports EJB 3.0, 2.1, 2.0, and 1.1.
License: BSD License (original)
Changes:
New features in this release include JAX-RPC
support via CXF, Tomcat 5.5 support, and support
for using OpenEJB as an OSGi bundle. Notable
improvements were made around usability,
validation, and configuration.
