American Hydrotech, Inc.
Hydrotech’s Green Roof, the Garden Roof Assembly is the latest innovation in roofing/waterproofing using MM6125 and 40+ years of successful installations around the world.
http://www.hydrotechusa.com/

Roof Genius
Roof calculator, calculates a detail list of roof materials, and a complete estimate. Two ways to determine roof pitch. Offers tips and how to's on roofing. [Windows 95/98/2000/Me/XP/NT]
http://roofgenius.com/

Decra Roof Systems:
Roof coverings using lightweight roof tiles for all roofs down to a ten degree pitch. UK.
http://www.decra.co.uk/

Roof Products, Inc.
Manufacture prefabricated roof curbs and other roof accessories. Products include expansion joints, equipment supports, adapters, and ice deflectors.
http://www.rpicurbs.com/

Roof Coatings Manufacturers Association
Roof Coatings Manufacturers Association (RCMA) represents manufacturers of cold-applied roof coatings and cements. RCMA’s site offers product information and the latest roof coating news.
http://www.roofcoatings.org/

Fibreglass Roof Decking
Roof Decking From Dura Composites Ltd
http://www.roofdecking.co.uk

City of Chicago: City Hall's Roof Top Garden
An experiment to cut energy costs and reduce pollution. Page includes information about the design and construction, as well as the method of testing its benefits.
http://egov.cityofchicago.org:80/city/webportal/portalContentItemAction.do?topChannelName=HomePage&contentOID=536908578&Failed_Reason=Invalid+timestamp,+engine+has+been+restarted&contenTypeName=COC_EDITORIAL&com.broadvision.session.ne

Exhart
Whimsical garden decor for your beautiful home and garden patio. Wholesale garden accents, wind chimes, garden accessories, statuary, kinetic art ...
http://www.exhart.com

Garden With Insight
Garden with Insight is an educational simulation of a home garden. You can plant and grow vegetables and learn more about how the soil and plants work.
http://www.gardenwithinsight.com/

Four Seasons Garden Gazebo Ltd
Four Seasons Garden Gazebo - a luxurious new way to enjoy your garden - whatever the weather. Also, Commercial Gazebo, Smoking Shelters, Hot Tub Gazebo, BBQ / Barbeque Gazebo.
http://www.fsgltd.co.uk/