Simple Server Monitor (SSM) is a powerful, yet easy to use server monitoring utility to help ensure your sites and servers are on line at all times. 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/HTTPS, FTP/FTPS, SMTP/SMTPS, POP3/POP3S, IMAP/IMAPS, and Custom monitors on any port.

The license of this software is Free Trial Software, the price is $69.95, you can free download and get a free trial.