NASA General Aviation Propulsion Program  
   Program to improve small airplane engines.
   http://www.grc.nasa.gov/WWW/AST/GAP/

Boeing Technology Services - Aerodynamics  
   Wind tunnel test facilities
   http://www.boeing.com/assocproducts/techsvcs/boeingtech/bts_aerz.html

Ultra-Efficient Engine Technology Program  
   NASA sponsored program to research and develop next generation aircraft engines.
   http://www.ueet.nasa.gov

Turbo & Jet Engine Research Laboratories  
   Israel Institute of Technology. Does theoretical and experimental R&D work in jet engines and gas turbines, for high-efficiency low NOx small-medium engines.
   http://jet-engine-lab.technion.ac.il

Blastwave Jet Company  
   Information on a little known bent pipe blast wave or pulse jet engine.
   http://blastwavejet.com