Inkscape is a free, open-source application with a great tagline: draw freely. Inkscape can be used for illustrating, and is especially useful when you need vector graphics, such as for laser cutting or scaling drawings without the loss of resolution. If you haven’t used Illustrator before, start with the tutorials. You’ll be drawing in no time.
Architect studio 3D. create your own house inside and out! click design gallery to get started..and read the instructions they are helpful! use _ and + to zoom in and out when you look at the house in 3D!!!!!