Free download of furniture in OBJ format for Blender
A good place to search for furniture models made with Blender is Blend Swap, because all models there are created using Blender and some of them will even came with a creative commons license that allows us to do whatever we want with the model. But, it is always interesting to look at some other sources for furniture models. In fact, almost all furniture dealers or designers offer some kind of 3d model from their products. If this furniture is available in formats like OBJ, we can use it in Blender.
This is the case of all furniture from Fritz Hansen, which offers almost their entire catalog in OBJ format and even allow us to download textures. And for those of you that prefer to model everything, for each furniture object you will also find drawings with orthographic views of the products that works great as reference images for modeling.