Unity - The multiplatform game creation tools for everyone.
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.
Godot Engine - Feature-packed 2D and 3D open source game engine.
3Dream - Design your room in 3D quickly and easily.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Planoplan - Free simplest online tool for 3D interior design