Gombinoscope - Make and mix up faces
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Sculptris - Sculptris: Enter a world of digital art without barriers.
Face Gen - The easy way to create realistic faces 3D human faces from 1 or 2 photographs or at random.
Sketchcop - composite software used by law enforcement
Monoface - randomly generate faces using parts from other faces