Design Manager - Design Manager is an interior designing software that is designed by the leading project management and architecture groups of the world.
Ecdesign - Ecdesign.
Opun Planner - Opun Planner is a free and web based design planner for all kind of interior designing requirements.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Unreal Engine - Unreal Engine 4 is a suite of integrated tools for game developers to design and build games, simulations, and visualizations.
Palette CAD - Palette CAD is one of the easiest 3D design software for those people who want to use a simple to use program for interior designs.