Wind Energy
The British Wind Energy Association is a good place to start for further information
Navitron import wind turbines at low prices
Proven are a well-established builder of medium-sized turbines
Renewable Devices build roof-top turbines
Hugh Piggott's web site and Otherpower are excellent sources of information if you want the challenge of building your own turbine.

Hydro
The British Hydropower Association is a good starting point for further information.
Navitron import small turbines from the far east at low prices

Solar Hot water
The Solar Trade Association has a list of many professional installers

Solar electricity
The British Photovoltaic Association is a professional body for solar installers.
The Scolar consortium has some educational material about photovoltaics.
The discoversolarenergy.com website has thousands of solar related links.

Biofuels
The British Pellet Club website has links to information on pellet-fuelled stoves.

Heat Pumps
Try the Heat Pump Network, the Ground Source Heat Pump Club, or the Heat Pump Association for more information

Energy Efficiency
The Energy Savings Trust gives advice on how to improve energy efficiency

Miscellaneous
REUK. Loads of up-to-date information on aspects of renewable energy, with a slant towards DIY installations in particular.
The Humanure book. Brilliant. I'm going to build one of these things one day.
The Canal Shop Co's directory has links to many other narrowboat related sites.
We share offices with Outspoken Delivery, a bicycle courier company in Cambridge.
Kevock Garden is a plant nursery specialising in alpine plants.
Positive Power has links to all things connected with renewable energy.
Caravanning Online is a UK caravanning directory.
Want to find an ethical career? Try Ethical Jobs.
Living Ethically is an organic, ecological and ethical shopping and information portal.
Gillian, at Telling Research, undertakes qualitative research, with a particular interest in public policy, social change, and sustainable development. She also maintains a blog, which she has kindly featured us in.