Verge3D - Practical framework for creating 3D Web applications
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Sketchfab - Sketchfab is an industrial design software tool is useful for ideation and for beginners in the industrial design field.
Sculptris - Sculptris: Enter a world of digital art without barriers.
PlayCanvas - PlayCanvas is an open-source game engine built on WebGL and WebVR.
ZBrush - ZBrush is a digital sculpting and painting software solution.