Other lesser known Halloween traditions include dressing up as spooks and specters and the recently deceased, getting drunk, stealing candy from children who are out carrying it, and maybe now a little ZombieBooth on your HTC EVO.
ZombieBooth is a fun little app that lets you see what you or your friends would look like if you went as a rampaging reanimated corpse to a party. It not only zombiefies you, it re-animates you into a rather terrifying visage of what you'll be like after the zombie apocalypse as well
It suffers (at least on my HTC EVO 3D) the problem of not working with the front-facing camera, which makes taking pictures difficult. I've taken enough MySpace-angle photos on phones that it wasn't much of an issue for me, but you can use a mirror if you never mastered covering up your chub in self photos on MySpace or ask someone else to take the pic for you.
You shake the phone to switch zombie types, and touch the screen to get bitten. It's fun, a little buggy, but free.
Post your zombie pics if you have any good ones.