Jewelry CAD Dream - JCD is a powerful and robust jewelry design solution.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Rhinojewel - Rhinojewel is a Jewelry Design Software which lets you create 3D models of jewelry and other luxury items easily, precisely and quickly. Jewelry Modeling Tools for Designers.
FreeCAD - An open-source parametric 3D modeler
RhinoGold - RhinoGold is the preferred software for jewelry design and manufacturing.
MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming