Floor plans
You can create floor plans with Gliffy.
                                                 
                                            
A quick and easy way to make sure your drawing is to scale is to use a rectangle in your diagram's background and to set it to a custom size (see Resize objects).
                                            To help you create them, when you create a new diagram, you can choose from several Floorplan templates.
                                                 
                                            
And, several Floor Plan shape libraries offer shapes like doors and furniture.
                                                 
                                            

