PhotoFunia - Have fun with your photos
Have a look at photofunia,
it gives cool effects to the pictures, some of them are really cool. All such sites normally use facial detection
technology which is currently one of the key research areas in
computer science.
If you want to know more about face detection then here is
one good site.
Btw I have also photo funia some of my
pictures: P
Cheers
Nasir Ali Khan