FlashFace
It provides a palette of facial objects: eyes, jaw, hair, etc. For each, you pick the one you like, then place and size it appropriately. I thought the Flash-based interface was pretty clever. You can even save your creation.
Gombinoscope
Make and mix up faces
Autodesk Character Generator
faceMaker is a free web app to create custom cartoon avatar and profile picture.
PortraitPad
Sketch photo realistic facial composite pictures easily and fast besides having a great user experience you had never before.
Sketchcop
composite software used by law enforcement
Monoface
Click the mouth, nose, head, and each eye to create a different monoface in this Happy New Year interactive greeting from mono.
Faces ID
Facial composite software. The award-winning Faces forensic imaging software used by law enforcement worldwide is offered in b ...
Abrosoft FaceMixer
Abrosoft FaceMixer is designed to create fantastic face composite with multiple individual faces. Using intelligent face detec ...
Morphases.com
Morphases is an online next generation software in face manipulation. It allows user to modify and create human faces from dif ...