http://www.gas-guide.org.uk/meters.html
Very useful article on how to read a gas meter and turn it into a number to figure out prices for gas used.
http://www.bensdiscountsupply.com/
These guys sell some solar equipment as well as low energy and other off-grid technology freezers, fridges, and so on. They seem reasonably cheap.
http://solarhome.org/
Company selling solar stuff. Ranks well on search, heavy on marketing a little light on technical information. They have some seemingly good deals. Sent tech question, auto responder, we cannot help, try online. BASTARDS
https://www.affordable-solar.com/
Interesting solar site that sells a bunch of solar stuff including complete kits.
http://www.mariahpower.com/
A wind turbine that uses a vertical frame that rotates around a central pole. The system is $6k to $9k and includes an in-built inverter to delivery appliance ready power.
http://www.backwoodssolar.com/catalog/hydropower.htm
Useful info on micro hydro including a chart showing head and flow to output power. Very handy.
http://www.microhydropower.net/
Lots of info on micro hydro including a book on creating your own systems.
