CE Task Manager
the author of this app says:
On Windows CE devices, switching to and ending tasks is a very tedious process. You must wade through layers of menus only to find a very basic GUI that will allow you to switch to and terminate tasks. CE Task Manager provides a view of running tasks and process with a look and feel similar to the Windows NT/2000 task manager. CE Task Manager lives in the Windows CE System Tray where it is only a tap away. Of course, if you don't want it in the system tray you can always get to it from the start menu.