If you do as much development on devices as we do, I'm sure you would appreciate a tool like Remote Process Viewer, but that runs on the device.  Something like the Task Manager on the desktop, right?  Well we've finally productized and released a tool we wrote and have been using internally for quite some time called TaskManCF.  It gives you the ability to kill an app (via WM_CLOSE like the "Running Programs" applet) Terminate a process (via Terminate Process), suspend, kill or change the priority of *any* thread in the system plus view all loaded modules.

It runs on CE or Pocket PC/WM (not Smartphone - sorry) and, as the name implies, uses the Compact Framework version 2.0.

Get the evaluation version or purchase it here