PA Server Monitor is a Windows service that monitors the health and availability of Windows servers, network services (on Windows, Linux and other operating systems), and devices. No agents are needed to monitor remote servers. Rich reporting too.
We are finished testing [PA Server Monitor] and are very pleased with every aspect of it ... [I like] routines for setup (could not be easier), pricing - compared to other products this is a bargain, interface, stability, reporting, and remote monitoring. The first week of use the program generated around a $1000 extra for us.
I wanted to say thank you for the brilliant product, PA Server Monitor! It has given me a much greater sense of security and confidence in my network administration duties, and is an absolute must for every admins toolkit.