Architex

FF&E Resources
Lapalma
Cascando
Pineapple
Connection UK
Impact Acoustic
PROLICHT
Really fantastic track, linear, downlighting, etc. All configurable.
Watson Furniture
Camira
Kvadrat
Haworth
Davis Furniture
SIXINCH® USA
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.
BuzziSpace
Turf Acoustic
Bejot
ERG International
ERG offers a wide selection of lounge and soft-seating furniture
ORIGIN
Material Bank
Global Furniture Group
Kettal
FilzFelt
Archiproducts
Commonwealth Plywood Distribution
3-Form
Products — FACT Design
Frasch
Loftwall
Unika Vaev