Ballard Power Systems -- Fuel cells.
Bill Beaty -- Science Hobbyist. Lots of interesting information. Some very good articles on how things really work.
Department of Energy Technical Standards -- Good information on chemistry, physics, electonics, running a nuclear reactor, etc.
e-Print Archive -- Lots of articles from the Los Alamos National Laboratory archive. Be aware that there is nocheck on the validity of any of this information. Some of this stuff definitely belongs in the pseudoscience section.
Galileo Research -- Electric cars.
HFML, Levitation -- High Flux Magnetic Laboratory. How to levitate a frog. Interesting photographs.
NASA Institute for Advanced Concepts -- For those folks that believe that rockets just don't cut it.
Quasiturbine -- Zero vibration Rotary engine. A new concept in engines.
Ranque-Hilsch Vortex Tube -- How to get hot and cold air at the same time from compressed air.
WebElements -- Periodic table.
Send me email: cliff_harris@earthlink.net