Sweet Home 3D - Sweet Home 3D is a free interior design application that helps to draw the plan of house, arrange furniture on it and visit the results in 3D.
ZMorph - A multi-fab 3D printer that enables fast product prototyping
SketchUp - 3D for Everyone
Lasergist - Your custom design in pure, laser-cut stainless steel
MagicPlan - The floor plan creation app magicplan lets you create dimensioned floor plans without actively measuring or drawing. With its Augmented Reality.
Form 2 - The most advanced desktop 3d printer ever created