KillSwitch - KillSwitch is an advanced system monitoring tool that is apart of
WinSpy - Retrieve window information.
Kiwi application monitor - Kiwi application monitor is a small program which lets you monitor your applications/processes, Windows and User activity.
Winspector Spy - Have you ever used Spy++ that comes with MSVC?
Security Process Explorer - Security Process Explorer Give you detailed information about each and every process.
Window Detective - Window Detective is a programmer's tool used to "spy" on an application's windows...