J2EE Servers
J2EE Server:
A middleware solution which confirms to the J2EE standards. Sun has a J2EE certification process for servers to test their compatibility with J2EE standards. Not all J2EE servers are Sun certifiied.
J2EE systems typically include Web servers, application servers, messaging software, and increasingly Web-services engines. J2EE is an umbrella specification that includes many popular technologies: Servlets, JSP, EJB, JMS, and the Java Web-services APIs (SAAJ and JAX-RPC) are all part of J2EE.
From : www.objectinnovations.com/Guides/JavaVersions.html
Apache Geronimo
The aim of the project is to produce a large and healthy community of J2EE developers tasked with the development of an open-source, certified J2EE server that:
is licensed under the Apache License
passes Sun's TCK for J2EE 1.4
reuses the best ASF/BSD licensed code available today, with new ASF code to complete the J2EE stack.
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