Efficient Windows Collaborative - http://www.efficientwindows.org/
Coalition of manufacturers, research organizations, and government agencies interested in expanding the market for high-efficiency fenestration products and promoting energy efficient windows. Includes informational articles on window technologies and benefits, manufacturer and supplier index, glossary, publications and newsletter, FAQ and membership info.
Old House Resources - http://historicbldgs.com/
Resources and information on the preservation, repair and maintenance of historic buildings. Includes email discussion group, news and events, articles and historic building consultants index.
Wallpaper Installer - http://www.wallpaperinstaller.com/
Information about wallpapers and DIY wallpapering covering wallpaper estimation, preparation, repair, care and stripping. Includes wallpaper installer database, discussion forum, FAQ, articles and glossary.