Face Morpher

The Face Morpher lets you upload a passport-style image of yourself and then lets you change your age, race or sex.
It also lets you transform your picture to the style of a famous artist, to make an exaggerated caricature or even make an ape of yourself.

It does take some playing around in order to get good results but it's a lot of fun.
Here's what I look like as

an older adult	a West Asian
an Afro-Caribbean	an East Asian

[Via EdAdkins.com]