Utilities
Acea
AceaElectrabel
AlpEnergie
apX: Amsterdam Power Exchange
Compagnie Nationale du Rhône
Energie SaarLorLux

Associations
AVERE: European Association of Electric Road Vehicles
Cigré: International Council on Large Electric Systems
Cired: International Electricity Distribution Community
Danish Wind Industry Association 
ETSO: European Transmission System Operators
Eurelectric: Union of the Electricity Industry
UCTE: Union for the Co-ordination of Transmission of Electricity
UIE: Development of electricity applications across the world
Université virtuelle de l'éolien
VGB: Technical Association of Large Power Plant Operators

Research and Development
ecoba: European Association for Use of the By-Products of Coal-Fired Power-Stations
Kema Information Center: standards, tests, certifications
Laborelec: The Belgian Laboratory for the Electricity Industry

Utilities
Distrigas: natural gas trade
Fluxys: natural gas transport

Associations
ENGVA: European Natural Gas Vehicles Association
Eurogas: European Union of the Natural Gas Industry
GTE: Gas Transmission Europe
IANGV: International Association for Natural Gas Vehicles

APERe: promotion of renewable energies
CEER: Council of European Energy regulators
Clingendael International Energy Programme
CRE: Commission de Régulation de l'Energie (France)
Energy assistance: Worldwide humanitarian projects
European Commission Energy
EWEA: European Wind Energy Association
IEA: International Energy Agency
Informatiecentrum Duurzame Energie
SUEZ
SUEZ Energy International
The Utility Connection
Tractebel Engineering
World Council for Renewable Energy
World Energy Council 

Nuclear
IAEA: The International Atomic Energy Agency
NEA: Nuclear Energy Agency
The Virtual Nuclear Tourist
The World's Nuclear News Agency
U.S. Nuclear Regulatory Commission
World Nuclear Association

N-Allo: Customer Communication Center 

Euronext