If you are running Android 2.1 or 2.2 you do not want to use app killers. It actually hinders performance and could cause more problems because Android has built in app killing functionality into the OS.

No app currently exists that can do all three of those. You can get an app that can do the first one, there are lots of those but I wouldn't recommend any of them. Or you can get an app that can do those last two...

  • Native Marketplace
  • Uninstaller
  • AppBrain App Market
  • My Market
  • App Center - by AndroidPit

I agree that it could potentially cause problems (I've only had one problem app [SportsTap used to give me a pop-up when I'd force-kill it], and that has subsequently been fixed), but they definitely have their place. Sometimes I want to kill everything possible in one fell swoop because of a problem with the app. For example, the built-in newsfeed widget sometimes messes up my touch screen, and killing it corrects my touch issues.

Nonetheless, I'm using TaskPanel these days. As Webs said, it doesn't do install/uninstalls, but since he covered those, I figured I'd recommend my task killer of choice.

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