Tomcat-manager is a project mainly written in ..., it's free.
A new skin for tomcat manager that gives you a better idea of what's going on
A simple skin for the XML view of the manager status page included with tomcat, compromising an XSLT stylesheet and a CSS file.
Visit http://localhost:8080/manager/status for one of your tomcat instances. Not pretty is it? What I was after was something more useful.
See screenshots/in-action.gif
Copy xform.xsl and the css folder to your tomcat manager webapp root (e.g webapps/manager) and visit: http://localhost:8080/manager/status?XML=true