Many of us used Admin tool for debugging flash movies in the past, being a great debugging tool (for me much better than the one provided in flash).
Now Admin Tool is an opensource project!
What is Xray?
Xray (The AdminTool) is a “snapshot viewer” of the current state of your Flash application without impacting the performance or the file size of your application. Xray’s true nature is to look into the very guts of the Flash application and dissolve the 2d myth you see on screen to a 3D tangible entity you can truly crawl through.
The downloads provided with Xray are:
More info available at: http://labs.blitzagency.com/?cat=2