• Apache Tomcat - web server/servlet container
• ActiveMQ - message server

The following are the main directories:-

• activemq-data/ used for the message server
• apache-tomcat/ used for Tomcat web server
• bin/ contains all the standard scripts and ant XML files
• cache/ the cache directory ( outside of the web document root)
• data/ the database files.
• dev/ the source code. 
• docs/ the compressed and encrypted documents. 
• logs/ all the logs for the system.
• private/ temporary