Google SketchUp is a 3D modeling program in which you can convert pictures from 2D into 3D. It is especially designed to create 3D images related to professional projects.
With Google SketchUp you can start a project or use one from another user. After finishing it you can also share your results, allowing the rest of users to use your work. It’s a way to improve and sharing ideas with the people who are interested in the same field.