the author of this app says:
PocketSTM is an application designed to provide some basic functions that you are sure to appreciate. The features are available at all times because the control panel resides on your navigation bar.
One of the most convenient features is the ability to view, switch to and/or close any application running on your PocketPC with just two simple clicks, even while you are in another program. It also gives you the ability to open documents and start programs effortlessly through several methods including quick start functions, sub-menues and icons.
Monitor your resources from within any application to find out the status of your memory, your storage card memory and the power level of your device's battery. If that isn't enough to convince you how convenient and useful this program is, here is something you are sure to appreciate -- volume control! Now you can adjust your volume settings or mute the sound simply with one click!
This freeware version has some functional limitations. See the help file for more information.