Those that have been extended are:
• A $1,000 credit for contractors who build or remodel homes to meet federal standards for conserving energy with the use of approved components such as high-efficiency windows, insulation, furnaces and water heaters.
• A 30 percent credit (to a maximum of $2,000) for homeowners who invest in a solar-energy system for generating electricity or heating water.
• A 30 percent credit (with no cap) for businesses that invest in solarenergy systems.
Although this extension helps, it still leaves quite a few items off the list according to the Columbus Dispatch.
A complete look into energy saving tax-credits can be found here at the Department of Energy website.