Concentrating Solar Power Program
The US Department of Energy's site provides information about electric power options using concentrated sunlight.
Concentrating Solar Technologies
An international team of scientists and engineers collaborate to develop these technologies and share their vision and knowledge.
Flasolar.com
Information about solar pool heating, solar water heating, and some photovoltaics for residential applications.
Solar Collector and Greenhouse
Manual covers everything from exact material lists to avoiding common problems.
Solar Water Heater
Build this one yourself as it is a bolt together design that can be built in the average home workshop with a limited amount of engineering skills and equipment