Apache Geronimo v2.1.6 server has passed the SUN's JEE5 Certification Test Suite. Downloads are provided for both Windows and Unix (including Linux, Mac OS X) operating systems. Each Geronimo server package includes one of two possible Web containers, Tomcat or Jetty. Please choose the download with your preferred Web container in the name. Both Tomcat and Jetty are fully supported in Geronimo.