Blender - Blender is the open source, cross platform suite of tools for 3D creation.
nanoDLP - NanoDLP is a host and control software for SLA / DLP 3D printers.
FreeCAD - An open-source parametric 3D modeler
Lychee Slicer - A POWERFUL AND VERSATILE SLICER FOR SLA RESIN 3D PRINTERS With Lychee, prepare your 3D models for 3D printing: define the best orientation, create supports automatically, or manually, preview before sending them to your 3D printer.
MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming
AstroPrint - Slice, Store, and Print your 3D files from any web enabled device.