Monitor the status of your servers and Web applications from your desktop.
Simple Server Monitor is a powerful, yet easy to use network server monitoring utility. It allows you to monitor the status of your servers and web applications from your desktop. Simple Server Monitor runs as a Windows Service with GUI monitoring console. When a monitor fails, you are notified by a pop-up message, an e-mail alert, and/or a sound alert. Charts monitoring performance. Supports Ping, HTTP, FTP, SMTP, POP, IMAP, and Custom monitors. Version 2.0.5 may include unspecified updates, enhancements, and bug fixes.
Simple Server Monitor does what it is meant to do very well. It monitors server ports and alerts you (via several methods such as a popup, email, etc) if a service goes down. I also found the development team very responsive to requests for help and they're prompt in releasing updates and bug-fixes.