JBoss is an Application Server, which is support fully JEE (known as formally J2EE) specifications. It support EJB2/3, JSP/Servlet, JMS, JSF and other Java Enterprise Environment technologies. Other Application servers are WebLogic(Oracle), WebSphere(IBM), GlassFish(Oracel) and so on. At this time I am writing, you can download JBOSS stable version and latest versions from the following site: http://www.jboss.org/jbossas/downloads http://sourceforge.net/projects/jboss/files/JBoss/JBoss-6.0.0.Final (Direct link from SourceForge) I downloaded JBoss 6.0.0 Final (stable version). Latest version 7.0.0.Beta3 at the moment. And then upzip the downloaded file under c drive(Any folder you want) and then you will get the C:\jboss-6.0.0.Final directory. You can see several folders under it. Web root directory is install_dir /server/default and you can find install_dir /server/default/ROOT.war. When you goto http://localhost:8080 , JBoos will display install_dir /server/default/ROOT.war/inde