System Panel might be of your best interest. You can exclude what you want and then hit an 'end all' button. Maybe do it once when your phone boots and let it go from there. If an app reboots, just let it go. That's just my suggestion. But I don't know of any app that kills in intervals.
There must be something on your phone slowing it down. I was having the same problem. I had to wipe it clean of apps and then slowly add them back on to see what it was that was slowing my phone and draining my battery. I narrowed it down to Fancy Widget. But that's just my phone. Every phone is different!
Also, check out Android System Info....you can manually kill tasks if you're interested.
This may be a stupid question, but do you clean your cache's, etc. ?
If it keeps up, man will atrophy all his limbs but the push-button finger. ~Frank Lloyd Wright
Sometimes you need a CTRL+ALT+DEL. Do you need it everyday? Probably not. Will it come in handy once in a while? You bet.