Openfarmtech

https://www.opensourceecology.org/about-videos-3/

http://openfarmtech.org/index.php/Solar_Turbine_Prototype_at_Factor_e_Farm

http://openfarmtech.org/wiki/The_Only_Production_Steam_Engine_in_the_World

http://www.tinytechindia.com/ in production steam engines 5 an 18hp

http://www.sisustainable.com/

http://www.sisustainable.com/IMG/zip/SolarFire_Simulator_v-0-1.zip

http://www.sisustainable.com/Solar-Fire-Simulator Octave design package

http://www.solarfire.org/Techniques,19