Halle+
Cariboni Group
Cariboni specializes in high-performance lighting solutions - LEDs for urban, street, arenas, and more architectural applications (not really decorative). They do have a cool urban system called spoon, which is pretty stylish.
Vibia
Simes S.p.A. - Home Page
Lumenwerx
Solid fixtures
HEWI
Sanitary and hardware solutions - most RFA files on Bimobject.com
VIGO Industries
Hubert
Industry West
Blu Dot
Not sure if this is contract grade furniture, but I signed up for a trade account and 3D files and spec sheets are available.
COR
I've used many of their lounge seats, including "Shrimp" and Nenou. They provide downloads here: https://www.cor.de/en/downloads (and on BIMObjects)
Arkturka
Fellowes®
Monitor arms, keyboard shelves, whiteboards, etc - find 3D/Revit files in their downloads section here: https://www.fellowes.com/us/en/resources/downloads/
BuzziSpace
Grape Design
Zeitraum Sustainable Furniture
WOUD - International
Wewood
Wendelbo
Warm Nordic
Vitra
Verywood
Varaschin
True Design
Ton a.s.
Tom Dixon Official
TOLIX
TIPTOE
String Furniture
Stellar Works
Furniture (Contract/Commercial)
Plumbing