Blophome - Decorates, draws or designs any room in your house or office.
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.
Planner 5D - Home Design Software & Interior Design Tool ONLINE for home & floor plans in 2D & 3D. Read more about Planner 5D.
Live Home 3D - Live Home 3D is home design software for floor plan creation and 3D visualization that suits both amateurs and professional designers.
SketchUp - 3D for Everyone
Assetforge - Asset Forge allows anyone to create 3D models and 2D sprites using building blocks.