Task Manager or other?

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http://forums.androidcentral.com – I'm patiently waiting for my new DNA in the mail and just curious about an app killer or task manager that may be stock on the DNA? ? Currently Im using a Motorlla ATRIX 4G with AT&T and the Phone came with a task manager that has an "auto end list" in it that you can add any app onto the list so after 2min of not using the app it auto closes it down and will not activate again until you select it, it seems to have saved some battery life and processor speed. Anything similar or better that's stock on the DNA or suggested APS out there? ? Sent from my 2nd Brain.... (HowTos)