Resources

Energy Information Sources
Energy Information Administration - Official Energy Statistics from the U.S. Government
Energy Institute (Institute of Petroleum)
Financial Times
International Energy Agency
Norwegian Oil Operators - OLF the Norwegian oil industry association
OECD - Organisation for Economic Co-operation and Development
Oilfield Glossary - Schlumberger
Source for Renewable Energy - business directory for renewable energy
Touch Oil & Gas - Business Briefings
UK Oil Portal 

Oil & Gas Supplier Directories
Offshore Technology
Subsea Oil & Gas Directory

Tools
BP Conversion Factors
Currency Converter 

Offshore Oil & Gas
Offshore Magazine
Offshore Technology
Rigzone
UK Offshore Operators Association

Renewable Energy: Wind
AWEA - American Wind Energy Association 
Austrian Wind Energy Association
Danish Wind Energy Association
Irish Wind Energy Association
ISES Italia - Italy's Wind Energy Association
Offshore Wind Energy in Europe 
Offshore Wind Farms
Wind Farms of the World
Wind Atlas of the US
Wind turbines in Japan
Windpower Monthly
Windpower Photos

Renewable Energy: Biomass
BABFO
BioEnergy Network

Renewable Energy: Wave and Tidal
Clean Current - many thanks for images provided
Marine Current Turbines - many thanks for images provided

Other 
Energy Facts