I received an email from MyHertiage that reminded me of an application they have called the "Look-alike Meter." It is a little cheesy but most people like this sort of thing. It is more fun than serious but here is how they describe the app, keeping in mind that you have to sign up for at least a free account with them to try it out:
"MyHeritage has a fun widget that you and your family can enjoy. It's called the Look-alike Meter. Almost every family struggles with a well-known debate: Who do the kids resemble more? Mom or dad? The Look-alike Meter settles this dilemma once and for all, using state-of-the-art facial recognition technology! It compares a photo of a baby or kid to its parents, finds out the best resemblance and produces fun animated results. More than 1.25 million families have enjoyed the Look-alike Meter so far. Click here to try it out and have fun too."