Android App Manager app can be used to kill your currently applications ,save battery life and speedup your android phone.
You can also manage all installed apps in your android device at one click.
1). Kill all or selected currently running apps.
2). Save battery life
3). Check Available memory at runtime
4). Launch currently running apps by tapping on it.
5). Size of the apps in memory
6). Quick Uninstaller
7). Tap on the installed apps for more details of the app
8). Many more features
Android 2.2+ has changed the task manager mechanism.
You can not kill services and notifications.
The app is showing currently running processes
which includes some system process also, that always get started by system events even
after you kill that process.