I recently downloaded the iMut8r app for my iPhone, since it is so close to Halloween.  What iMut8r does it allow you take pics of your friends and turn them into monsters.  You can choose from Zombie, Witch, Vampire, Werewolf, Frankenthing, Demon, or Ghoul.  It creates some pretty good, realistic pictures.  I can say I was definitely impressed with this app and feel it was definitely worth the 99 cents.  Just to show how well it can do, check out the picture of myself I did as a demon.  I think it came out pretty awesome.  So if you are looking for a fun app to turn pics of your friends into monsters for Halloween, check out iMut8r in the App Store.