Answer : There are a number of software programs that can be used for interior design. Some common ones include Chief Architect, AutoCAD, and SketchUp.
Each program has its own strengths and weaknesses, so it's important to choose the one that will work best for your needs. For example, if you need to create detailed 3D models, then SketchUp is probably a better choice than Chief Architect. But if you need to create construction drawings, then Chief Architect would be a better option.
Ultimately, the best way to decide which program is right for you is to try out a few different ones and see which one feels the most comfortable.