Monoface is described as 'randomly generate faces using parts from other faces'. There are seven alternatives to Monoface, not only websites but also apps for a variety of platforms, including Windows, iPhone, Android Tablet and iPad. The best alternative is Sketchcop. It's not free, so if you're looking for a free alternative, you could try FlashFace or Autodesk Character Generator. Other great sites and apps similar to Monoface are PortraitPad (Free Personal), Gombinoscope (Free), Abrosoft FantaMorph (Paid) and FaceGiggle (Paid).
PortraitPad is a web application for creating facial composite picture which is equipped with its own originally high quality features catalog. PotraitPad is created based on Microsoft Silverlight 5.0 technology.
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.
Want to surprise your friends with hilarious holiday greetings? Looking for funny birthday wishes? Or just want to make everyone around giggle? It's super easy! Download FaceGiggle and let the fun begin...