Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Unity - The multiplatform game creation tools for everyone.
MakeHuman - MakeHuman is a free, open source, interactive modeling tool for creating custom 3D human characters.
Godot Engine - Feature-packed 2D and 3D open source game engine.
ZBrush - ZBrush is a digital sculpting and painting software solution.
Sculptris - Sculptris: Enter a world of digital art without barriers.