TaptoGoBack!(formerly GoBack!) is not just another Task Switcher but an obvious extension to the Pocket PC look and feel. Its so simple and natural to use you'll wonder why it wasn't there in the first place

TaptoGoBack! adds a button to the top of the screen which can be used to go back to the last opened application.

It has a number of modes:

Toggle - switch between the last two open applications. Say your on Pocket Excel and open the calcualtor this mode allows you to switch rapidly back and forth between the two. Loop Last 3 - goes back between the last 3 open programs. Loop all - goes back through all open programs Go Back to Today - Always takes you back to the Today screen - very useful if you have an application launcher on the Today Screen.