PA Server Monitor has powerful features that are very simple to setup. The Free edition monitors web pages, ping response and the Windows event log, and response actions that can send SMTP email notifications, reboot the server, and more. Reports can be generated about most monitored resources. Monitors a single server.
And, our product is smart. There's nothing like our Easy Configuration system for quickly setting up multiple computers, or our smart email alerts that bundle alerts together to keep from overwhelming your inbox. Our smart alerting will tell you about a particular problem once, and then tell you when it is fixed (instead of the constant stream of mindless 'still broke' messages that other products send).
See <a href="http://www.poweradmin.com">Server Monitor</a> at PowerAdmin.com for more details