What sort of thing are you looking for? Find my iPad is an Apple app to allow you to locate your iPad if it gets lost / stolen, play a sound and write a message on the screen (e.g. please call this telephone number), place a passcode on to the iPad so people can't access it if you've left it somewhere public and finally wipe the iPad remotely if you think you're not likely to get it back - at least that protects your personal data.
There won't be another equivalent app which does all of this (I don't think) as I'd imagine only Apple could legally write such an app, and I don't think they'd allow any other publishers to put something similar on the App store.