Morph Thing - What will my baby look like if I make babies with my partner, friends, or celebrities?
Gombinoscope - Make and mix up faces
MakeMeBabies - Baby generator using face recognition to predict what your baby will look like.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
FutureBaby - Make use of advanced facial detection to see how your baby could look.
Abrosoft FaceMixer - FaceMixer is designed to create fantastic face composites with multiple images.