In the official enTourage eDGe store (press the shopping cart icon) you can download applications ("Apps").
I found Advanced Task Killer very practical for my purposes. It gives me control over what processes are running on Android. This helps soothe my suspicions regarding unnecessary battery drain, although I have not done any measurements.
Two applications running by default after booting, which I do not need and kill are:

• Alarm Clock

• Email

A word of caution: Other threads warn about killing apps because they might leave data structures in an inconsistent state. So you had better know what you are doing before you go and knock out a running task.