Hawk Furniture Ltd - UK Manufacturer of Office Furniture
KRUG
Bene
Cassina
Poliform
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.
BuzziSpace
Glimakra
Really cute stuff - acoustic hut pod (nice revit file), poufy beanbag chair, tree-like dividers, leaf acoustic hangings, accessories.
Ethnicraft
Design House Stockholm
CondeHouse USA
Carl Hansen & Søn
Audo Copenhagen U.S.
Actiu
GUBI
Gazzda
Nowy Styl
Some really nice pieces, especially the conference tables
Kinnarps
MillerKnoll Brand Collective
NARBUTAS
De Vorm
EMKO
Limited revit files
Frovi
I love their furniture so much. UK-based company. Sustainable (uses bamboo and sustainable fabrics - lists their CO2 footprint, certifications, etc). I've used them in a couple of projects, including their Bae, Bamboo, Relic, and Flord lines. Nice Revit files. Highly configurable.
Bejot
Bent Hansen
Alea
Sign up to download 3D files
Steelcase
Artopex
AMQ Solutions
Et Al