Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Inventor - Inventor is a 3D CAD software that lets you quickly create 3D models with embedded intelligence, intuitive workflows, and optimized performance.
Sculptris - Sculptris: Enter a world of digital art without barriers.
Autodesk Fusion 360 - Integrated CAD, CAM, and CAE featuring collaborative editing and cloud-based computation.
Misfit Model 3D - Misfit Model 3D is a 3D model editor that basically operates with triangle-based models.
MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming