Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Morpholio Trace - Morpholio Trace is widely called to be the dream software of the designers and architect.
FreeCAD - An open-source parametric 3D modeler
Qlone - 3D scan any object with your iPhone or iPad
MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming
Drawing Desk - Drawing Desk Draw Paint Color, Doodle and Sketch Pad created and published 4Axis Technologies for Android and iOS devices.