Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Vroid - A free 3D character modeller
Sculptris - Sculptris: Enter a world of digital art without barriers.
Misfit Model 3D - Misfit Model 3D is a 3D model editor that basically operates with triangle-based models.
DAZ 3D - Daz 3D, 3D Models, 3D Animation, 3D Software
Sketchfab - Sketchfab is an industrial design software tool is useful for ideation and for beginners in the industrial design field.