WSO2 Application Server is an Apache Tomcat-based lightweight web application hosting platform and an integral part of the WSO2 middleware stack. Java EE is a platform for Java-based enterprise application and has evolved significantly in the past few years. This white paper discusses Java EE specifications supported in WSO2 Application Server and its future trends. It also highlights value-added features that are available for Java EE applications when migrating from a traditional application server to a Flightweight WSO2 Application Server.