Blophome - Decorates, draws or designs any room in your house or office.
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.
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.
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.