Sweet Home 3D- an open source interior design application.

Have you ever thought of designing or redesigning your home? Then Sweet Home 3D is all you need. This application is a cross platform, open source interior design application that lets you place your furniture on a house 2D plan, with a 3D preview.
Numerous visual guides help you draw the plan of your home and layout furniture. You may draw the walls of your rooms upon the image of an existing plan, and then, drag and drop furniture onto the plan from a catalog organized by categories. Each change in the 2D plan is simultaneously updated in the 3D view, to show you a realistic rendering of your layout.
You can read more about the features of this application here.It runs on JRE and thus you would need to install that first if you have not done so yet. The download file and instructions can also be found here
This application is certainly a must have if you are an interior designer or are thinking of putting some professional touches on your home design.