The JEUS 8 application server from South Korean enterprise software development company TmaxSoft is now officially Java EE 7 certified! This means you now have two Java EE 7 compatible application servers - GlassFish 4 and JEUS 8 (GlassFish 4 is also certified against the Web Profile in addition to the Full Profile). The Java EE 7 application server choices will likely be expanded further by the end of the year with the likes of WildFly (formerly JBoss AS) 8.
You can check out the details and download JEUS 8 from the TmaxSoft site. Note that this is a developer preview and an official release is planned for 2014.