Active Strategies > Energy Harvesting 
Energy harvesting systems collect energy from the natural environment to provide electricity. These systems harvest energy either through an electrical process powered by the sun, a kinetic process powered by the wind, or a chemical process powered by biomass.
Photovoltaics>
http://www.greenspec.co.uk/html/energy/pvcells.htmlhttp://www.southwestpv.com/SOLAR%20MODULES.HTM
http://www.solarstore.com/solar_electric_components.html
http://www.fsec.ucf.edu/en/consumer/solar_electricity/basics/thin-film.htm
http://www.nrel.gov/pv/
http://www.nrel.gov/learning/re_photovoltaics.html
http://www.pfisterenergy.com/projects.html
http://www.schuco-usa.com/
http://www.sunpowercorp.com/
Thin film solar: http://www.powerfilmsolar.com/
Green Algae/Hydrogen>
http://www.ornl.gov/info/ornlreview/v40_1_07/article13.shtmlWind Power >
http://www.awea.org/smallwind/http://www.bergey.com/School/Primer.html
http://www.wind-power-generator.com/Residential_Wind_Turbines.html
http://www.csmonitor.com/2008/0430/p16s01-sten.html
For More on Energy Harvesting:
http://www1.eere.energy.gov/solar/
Evacuated tubes and cooling: http://www.sunchiller.com/whysun.htm