Blender - Blender is the open source, cross platform suite of tools for 3D creation.
MatterControl - MatterControl is a free, open source app that lets you organize and manage your 3D prints.
ZBrush - ZBrush is a digital sculpting and painting software solution.
Onshape - Onshape is the first full-cloud 3D CAD system. It runs in a web browser and on any mobile device.
Cinema 4D - Cinema 4D is a 3D modeling, animation, motion graphics and rendering application.
Slic3r - STL-to-GCODE translator for RepRap printers Here comes Slic3r! Its features are: - speed