Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Cura - Cura aims to be a end solution for personal 3D printing with RepRap based machines.
FreeCAD - An open-source parametric 3D modeler
Slic3r - STL-to-GCODE translator for RepRap printers Here comes Slic3r! Its features are: - speed
meshmixer - meshmixer is an experimental 3D modeling tool for making 3D mashups without too much hassle.
PrusaSlicer - PrusaSlicer (formerly known as Slic3r PE) is our own in-house developed slicer software based on the open-source project Slic3r.