From the developer: "A1Monitor network monitor and web server monitor makes sure your tcp/ip servers are alive and well. Monitor multiple URLs, ping any IP address, and monitor any other TCP server (ftp, pop3, smtp, telnet etc).

A1Monitor will notify you by email or pager if any of your monitored servers or URLs can't be reached (or returns an unexpected response) a number of times in a row. It can also reboot your server and/or run a batch file or executable for you when server failures occur. Supports http, https, ping, ftp, telnet, pop3, smtp, dns, imap, dns, or any other TCP port you want. Support for http proxy server for http and https monitoring. Supports URL basic authentication (http, https only) and more. Runs minimized in the system tray. This update features major user interface enhancements and some important bug fixes.

This is a 45-day trial. Full version retail price is $99."