General Healthy Housing
Alliance for Healthy Homes: Advocacy and consumer information.
Healthy House Institute: Consumer and builder information.
The National Center for Healthy Housing: Consumer, training and research information.
US EPA: Indoor air quality and radon information.

Green and Healthy Building 
Building Green: Information on products and materials. Environmental Building News.
Building Science Corporation: Information on building high performing homes, training and consulting services, special expertise on moisture.
Healthy Homes Plans: Plans and resources. 
Partnership for Advancing Technology in Housing (PATH): Information for builders, architects, and others on constructing high performing housing.
Rocky Mountain Institute: Consumer, research and advocacy information. Energy saving factsheets.

Energy Conservation 
Alliance to Save Energy: Consumer and advocacy information.
Database of State Incentives for Renewables and Efficiency (DSIRE) 

Green Flooring and Building Products 
Carpet and Rug Institute: Green Label and Green Label Plus carpet.
EFI: Fans, lighting and other products.
GreenSeal: Green rating system for building finishes, cleaning supplies etc.
Resilient Floor Covering Institute: FloorScore green rating system.