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/

Bilco
Roof scuttles, automatic fire vents, floor, vault and sidewalk doors.
http://www.bilco.com/

Specialty Doors
Interior doors, glass doors, sliding glass doors, acoustical doors, traffic doors, frameless glass doors, frosted glass doors, exterior folding doors, and door hardware.
http://www.specialtydoors.com/

Astrodraft
Draught proofing supplies - UK and Worldwide export.
http://www.astrodraft.com

Astino Berhad
Astino.The Symbol of Quality
http://www.astino.com.my/

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

Pella Doors and Windows
Premium Grade windows, patio doors, entry doors, storm doors and skylights. Available in the U.S. and Canada.
http://www.pella.com

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/

Cummins & Genzuk Report
An analysis of longitudinal study of structured English immersion and early exit and late-exit transitional bilingual education programs for language-minority children.
http://www-rcf.usc.edu/~genzuk/Ramirez_report.html