Zomut's Watchdog Task Manager takes a different approach to task-killing optimization apps. Rather than killing background applications and processes willy-nilly to free up memory, potentially doing more harm then good, Watchdog instead watches apps to see if they are hogging CPU resources. Should a particular app exceed certain thresholds, Watchdog will let you know, allowing you to pinpoint the resource hog, and kill it precisely, sniper-style, rather than shotgunning your system with app kill commands. If a particular app is a repeat offender, it's likely a case of bad app design, and should be uninstalled.
Editor's Note: The paid version removes ads and includes a 'blacklist' feature that auto-kills particular apps once they exceed a certain CPU threshold.