Pingdom - With website monitoring from Pingdom you will be the first to know when your website is down. No installation required. 30-day free trial.
Window Detective - Window Detective is a programmer's tool used to "spy" on an application's windows...
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Microsoft Spy++ - Spy++ (SPYXX.EXE) is a Win32-based utility that gives you a graphical view of the system’s...
Better Uptime - We call you when your website goes down
WinSpy - Retrieve window information.