Free Energy - Stirling Engine
Provides insights on the technology. Includes news, links, and information about the engine technology.
http://freeenergynews.com/Directory/StirlingEngine/

Wikipedia - Stirling Engine
Free encyclopedia article covers engine technology. Addresses historical and technical background, engine efficiency, thermodynamic aspects and applications.
http://en.wikipedia.org/wiki/Stirling_engine

Advances in Diesel Engine Technology
Insights about Diesel engine technology and applications. Addresses Exhaust Gas Recirculation (EGR), common-rail fuel injection, supercharging and controls.
http://www.cleanairfleets.org/advances.html

Advanced Engine Technology Ltd.
Manufacturer of ignition quality tester for diesel fuel, exhaust emissions, engine conditon testing. Company overview, products and services available.
http://www.aet.ca/

Veselovsky Engine
Description of the Veselovsky rotary piston engine from the Moscow State University. Includes technology background and drawings.
http://www.machaon.ru/tetra/veselo.htm

Ring Engine
Erfindung Neuentwicklung im Bereich Motoren Pumpen und Multifunktionsaggregaten Investoren und Entwicklungsingenieure gesucht 3D und 2D Animationen zeigen Funktionsmodelle - Toroidal working chamber and cylinder geometry with daring, partly conformal, pass-through rotary seals to perform compression and exhaust, pure rotary, all rotating parts, smooth, quiet. Several animations.
http://www.ringmotor.de/

SEODoctor.com
Information on the SEO Doctor search engine positioning tool and optimization software.
http://www.seodoctor.com/

Kramer Engine
Describes the basic of the patented Kramer engine technology. Includes technical background, compression law, construction review and insights, photos and diagrams.
http://www.siscom.net/~louisekramer/

Antigravity Technology - Superconductive Electromagnetic Engine
I make public the principle of the almighty engine, superconductive electromagnetic engine that can create antigravity force
http://se-engine.org

University of Wolverhampton
University of Wolverhampton School of Computing and Information Technology
http://www.wlv.ac.uk/Default.aspx?page=6964