Installations - Tomcat, Jboss, Active BPEL

1. Tomcat:
What is Apache Tomcat?
Apache Tomcat is the servlet container that is used in the official Reference Implementation for the Java Servlet and JavaServer Pages technologies. The Java Servlet and JavaServer Pages specifications are developed by Sun under the Java Community Process.

A Java servlet container is required to run Macromedia Flex and Tomcat is available freely under the Apache Software License. While the latest version of Tomcat, version 5.5.9, is not a supported application server for Macromedia Flex, while Tomcat 4.1.29 and 5.0.18 are, I have experienced no problems whatsoever using 5.5.9, and the performance increase is noticeable.
Installing tomcat in windows and linux can be found at:
http://www.onjava.com/pub/a/onjava/2001/03/29/tomcat.html?page=1

2. Jboss:

What is Jboss?
http://www.jboss.com/products/jbossas

Installing jboss in windows and linux(same procedure) can be found at:
http://www.developer.com/java/ejb/article.php/3071661

Note: Jboss 4.0 requires JDK 1.4 or higher
Jboss 5.0 requires JDK 1.5 or higher

3. Active BPEL:
What is Active BPEL?
http://www.active-endpoints.com/open-source-active-bpel-Intro.htm

Installing and Configuring Active BPEL:
http://www.active-endpoints.com/installation-guide.htm