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.
Microsoft Spy++ - Spy++ (SPYXX.EXE) is a Win32-based utility that gives you a graphical view of the system’s...
Battle Encoder Shirase - Software that controls per-process CPU usage: an “active” software CPU cooler.
Winspector Spy - Have you ever used Spy++ that comes with MSVC?
Processes - https://www.oneperiodic.com/products/processes/