Task Manager allows you to view running applications and processes on your Pocket PC.  To access Task Manager, tap and hold on the desktop, then select "Task Manager".

The applications tab displays all running applications (except eXPerience).  You have the option to activate an application or end it.

The Processes tab displays running processes.  You have the option to end any process.  Use this feature with extreme caution.  Shutting down a process can have unknown effects.  This feature is for advanced users.