Mapping Matter - Web Based creative tool for technical designers
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
TouchDesigner - TouchDesigner is a visual development platform that equips you with the tools you need to create stunning realtime projects and rich user experiences.
FreeCAD - An open-source parametric 3D modeler
HeavyM - Simple video mapping software with a huge library of effects.
Sculptris - Sculptris: Enter a world of digital art without barriers.