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

Mack Prototype Inc
Our Services Include Rapid Prototyping with CNC, Rapid Prototyping with SLA, Polyurethane Molding, Rapid Tooling, Injection Molding
http://www.mackprototype.com/

Canon Painting Inc.
Nationwide industrial coatings and linings contractor. Specializing in industrial coatings, floor and roof coatings, abrasive blasting, high-pressure water blasting and waterproofing.
http://www.canonpainting.com

NaturePainter Software
NaturePainter Digital Canvas is the natural media painting software for Windows that makes it easy to learn, practice and teach painting. Comes with tutorials, try different natural painting techniques, use different brushes and tools, and experiment with colors and styles.
http://www.naturepainter.net/

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 Menders
Tin Roofs: protecting our rich heritage against leaks and rust
http://www.roofmenders.com/