The EE Times lists "PlasmaERG" as a finalist in their 2010 "ACE Award" for "Most Promising Renewable Energy".
http://www.eetimes-ace.com/finalists.php
The "PlasmaERG" company claims to make an engine whose fuel is a mixture of noble gases. http://plasmiccontrol.com/contact.html
The engine traces its origins to the work of con-man Joseph Papp.
http://www.museumofhoaxes.com/comments/papp.html