Face Control is a free plug-in for Adobe Photoshop that allows to change the facial expression of the people appearing in your digital photos.
At least that's what the author's description says, although I must say that the reality is quite different.
Face Control does change the expression, that's true.
But the lack of advanced options (there's only one single slider) makes the result quite disappointing. I'd rather define this plug-in as a pseudo-morphing tool to have fun with your friend's pictures, than as an app to change facial expressions.
On the upside, Facial Control is so simple even a child could use it: simply move the slider to one side or the other and see the new expression in real time.