Glass Fireplace Doors by Design Specialties, Inc.
Manufacturer of glass fireplace doors, enclosures, screens and accessories for the hearth. Includes a dealer locator.
http://www.glassfireplacedoors.com
Smart-Builder glass software
Smart-Builder provide design configurator software for the frameless glass industry
http://smart-builder.com
TruStile Glass Doors
Trustile is the premiere manufacturer of interior and exterior wood and MDF doors (stile and rail, French and custom), for new construction or remodeling.
http://www.trustile.com/catalog/glassdoors/?series=0