JBoss.com - Wiki - Main. Meet the new JBoss - Java World. JBoss 4.0 is remarkable in a number of ways.
Not only is it an open source, platform-independent, full Java 2 Platform, Enterprise Edition (J2EE) application server but its installation (on Windows 2000, the OS I tested it on) is ridiculously simple. JBoss includes a Web server (servlet/JavaServer Pages (JSP) container, and HTML server), Enterprise JavaBeans (EJB) 2.0 container, integrated Hypersonic 100 percent Java database engine, Java Message Service (JMS), JavaMail, and Java Transaction API/Java Transaction Service (JTA/JTS) transaction support.
Earlier versions of JBoss used the Apache Tomcat Web server, but JBoss 4.0 is available in an Apache Tomcat version or a version that uses the embedded Jetty Web server. Jboss.org community driven.