Lindner
http://us.lindner.ag/Home_us.Lindner
Fold-down modular, Drop & Slide, Hook-On, linear, curved, mega panels, canopy, trapezoidal, triangular, chilled, fire-rated.

Gordon
http://www.gordongrid.com
Millennium ceiling panels, Aluma Vault, Beam Mate, Security Ceilings.

Hunter Douglas
http://www.hunterdouglascontract.com
Luxalon planks, tiles, open cell, soffits, linear & cell frame.

USG
http://www.usgdesignstudio.com
Celebration, Panz, Curvatura, Libretto, Geometrix, Paraline, Gridware, Wireworks.

Shanko Products
http://www.shanko.com
Tin & Copper