Apache Geronimo is described as 'A Java EE 5-certified application server for web and enterprise applications based on Suns Java EE platform specification. The goal of the Geronimo project is to produce a server runtime framework that pulls together the best Open Source alternatives to create runtimes that' and is an app in the development category. There are eight alternatives to Apache Geronimo for a variety of platforms, including Windows, Linux, Mac, Self-Hosted and PHP apps. The best Apache Geronimo alternative is TrailBase, which is both free and Open Source. Other great apps like Apache Geronimo are Glassfish, JBoss, Oracle Weblogic Server and appserver.io.