The JBoss AS community project has been renamed to the WildFly community project, which has a new home at wildfly.org.
The JBoss name now only applies to the commercially supported product, called JBoss EAP, which is derived from the WildFly community project and is available here.
For more information on the differences between the project and product offerings, see the JBoss.ORG technology page.
You can find old JBoss AS community releases on our archived downloads page, however, these releases are not maintained and therefore are likely to contain bugs and security vulnerabilities. It is highly recommended that you upgrade to WildFly or JBoss EAP using the above links at your earliest convenience. If you require assistance in making this move, please ask on the forums or contact your local Red Hat account representitive.