Directory of building products and manufacturers. Not restricted to green building materials.
EcoBuild Web Ring
For research and information groups dedicated to improvement of the built environment in balance with the natural environment.
GreenSpec: The Environmental Building News Product Directory
Directory from the publishers of Environmental Building News.
Materials Analysis Tool (MAT)
A free online ranking system that distills manufacturer information to assist in the selection of building products that are more cost effective, healthy and environmentally responsible.
Wisconsin Built Directory of Energy Efficient and Sustainable Building Products and Services (Madison, WI : Wisconsin Green Building Alliance, 1998)
Directory of Wisconsin-based suppliers of green building materials.