Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Klapty - Create and share your virtual tours for free or have them done by a professional photographer. Klapty - The world in 360 °.
FreeCAD - An open-source parametric 3D modeler
VirtuallyShow.com - VirtuallyShow.com is an online affordable and feature-packed virtual tour service that allows you to create your residential and commercial real estate virtual tours in just a minute.
MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming
Scenics.app - Create high-performing virtual tours, showcase your work, and share anywhere.