Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Floorplanner - Floor plan interior design software. Design your house, home, room, apartment, kitchen, bathroom, bedroom, office or classroom online for free or sell real estate better with interactive 2D and 3D floorplans.
ZBrush - ZBrush is a digital sculpting and painting software solution.
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.
Cinema 4D - Cinema 4D is a 3D modeling, animation, motion graphics and rendering application.
SketchUp - 3D for Everyone