• Database of State Incentives for Renewables & Energy Efficiency
  Searchable database of renewable energy financial incentives by state.
  
  
• Energy Star's Guide to Federal Tax Credits for Energy Efficiency
  A comprehensive guide to receiving tax credits for energy efficiency improvements and appliances.
  
  
• Energy Tax Incentives.org
  Home of the Tax Incentives Assistance Project, sponsored a coalition of non-profit groups and government agencies is designed to help consumers navigate the Energy Policy Act and receive tax credits
  
  
• U.S. Department of Energy Guide to the Energy Policy Act of 2005
    Currently one of the best resources for learning about federal tax credits for energy efficiency improvements
  
  
• RESNET
    Easy to understand guide to federal energy efficiency tax credits for home energy efficiency improvements
  
  
• Simply Insulate
    A guide to federal tax credits for insulating & installing energy efficient windows
  
  
• NAIMA tax guide
    North American Insulation Manufacturer's Association guide to federal tax credits for insulation improvements
  
  
• SEIA
    Solar Energy Industries Association: the national trade association of solar energy manufacturers, dealers, distributors, contractors, installers, architects, consultants, and marketers. Sign up to have their "Guide to Federal Tax Incentives for Solar Energy" emailed to you.  It is a great resource detailing financial incentives for PV installation.
  
  
• DataBase of State Incentives for Renewables & Efficiency
    A comprehensive source of information on state, local, utility, and federal incentives that promote renewable energy and energy efficiency
  
  
• EERE Guide to Rebates
  Office of Energy Efficiency and Renewable Energy link to financial assistance for business and industry
  
  
• Energy Efficient Home Mortgages
  Addressing questions and opportunities for mortgaging energy efficient homes.
  
  
• Mortgaging and Financing Energy Efficient Homes
  An overview of financing options for energy efficient homes