Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Gombinoscope - Make and mix up faces
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.
Abrosoft FaceMixer - FaceMixer is designed to create fantastic face composites with multiple images.
Sketchfab - Sketchfab is an industrial design software tool is useful for ideation and for beginners in the industrial design field.