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.
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
V-Ray - Learn why V-Ray for 3ds Max’s powerful CPU & GPU renderer is the industry standard for artists & designers in architecture, games, VFX, VR, and more.
Cura - Cura aims to be a end solution for personal 3D printing with RepRap based machines.