The other day in my search for some nice open source scrum software I came across a .war (short for Web ARchive) file. A quick google search revealed that to get this up and running I needed to get tomcat (a pure java HTTP web server enviroment for running java code) running, this is when I hit a little snag, so for those of you who are getting "cannot find java virtual machine in folder" error while trying to install tomcat ensure that you have set your java home path variable and dont run the windows binary from explorer, instead open up the command prompt, cd to the location of the installation file and run the file through the prompt.
Hope this helps....