I was very excited about this tool, but I've heard that under Vista you need admin rights, and it asks you for permission to copy the exe on your pc.
That might reduce the range of customers drastically.

http://www.puppenheim.org/
http://www.wuerfels-welt.de
Old Game Tutorial: http://www.puppenheim.org/MITutorial.zip
Free Game Editor: http://puppenheim.org/AlienalsWeihnachtsmann.zip
http://www.puppenheim.org/blender_starting_main_settings.txt