The B3D Blender 3D Assets (High-Quality 3D Assets for Blender users) - 3D models, materials, lights. fonts, HDRI maps, scenes, add-ons - all that gathered in libraries is now for free to download for every CG artist. Visit - www.b3dassets.com
Download for free B3D Links Blender Add-On which holds the list of the links to different real interior material and furniture manufacturer’s websites where the completely free 3D models and textures can be downloaded.
The 3D Assets directly from manufacturers come in different types of quality so it is only up to you to find the right ones for your project, but it can be done directly from Blender UI and much faster with B3D Links Blender Add-On.