Energy Information Administration - U.S. Government, Department of Energy
Renewable Energy - U.S. Government, Department of Energy
NREL - the National Renewable Energy Laboratory in Golden, CO
Environmental Protection Agency- U.S. Government
National Climate Data Center at the National Oceanic and Atmospheric Administration (NOAA)
Fossil Fuel Page put together by the U.S. Department of Energy
World Energy Council - International energy organization headquartered in London, UK
International Energy Agency - Another international one, based in Paris
International Atomic Energy Agency - Intergovernmental forum on the peaceful use of nuclear power
Nuclear Regulatory Commission - U.S. government agency; oversees commercial and private use of nuclear materials.
World Nuclear Association - For "sustainable development;" based in the U.K.
Department of Defense - the U.S. government gateway site to the military
Office of Energy Efficiency - Canadian government site
A few Petroleum Companies:
Shell Oil Exxon-Mobile British Petroleum Phillips Petroleum Chevron-Texaco