3Dream - Design your room in 3D quickly and easily.
Roomtodo - Simple yet powerful online tool for interior design and floorplans with built in walkthrough module.
Ashampoo 3D CAD Professional 10 - Ashampoo 3D CAD Professional 8 is a complete CAD solution for the designers and decorator that are looking for the centralized way to get done with their interior designer.
InnoPlanner - InnoPlanner is a commercial based interior designing software.
Planoplan - Free simplest online tool for 3D interior design
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.