Some people get kicks out of taking pictures of their friends, distorting them and sending them back to every one they know just for a good laugh. If that's what you're into, you can play around with any photo manipulation tool or you can find one which specifically distorts images.
Cartoon Maker is fairly basic but has a few tools to play around with your photos. While you won't ever be able to get into deep editing, you'll be able to apply different distortion and twist effects of which you can modulate the intensity. If you want to take the outline of a picture you can use the sketch tool. We suggest setting it at near maximum though if you want to capture the majority of the lines in the photo.
Despite the fact that you can only save to three image formats (jpg, bmp, wmf), Cartoon Maker is a good application if you're looking to quickly create distorted images of your friends.