Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Calspex - Calibration
FreeCAD - An open-source parametric 3D modeler
QMSys GUM - Calibration
MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming
QC-Pro Gage Management - Gage Calibration Management, Measurement System Analysis, GRR, SPC, Equipment Maintenance, Employee Training Log, Product Test Management