From Ajm Software:
AjmScout will monitor your servers to insure they stay up and running. Receive e-mail notifications when your servers are down so you can respond quickly to any outage. Generate outage reports to spot trends and highlight problem areas. Native support for HTTP, HTTPS, FTP, POP3 and SMTP as well as generic support for any server ensures your entire network can be monitored closely and efficiently. Maintain as much historical data as you need. AjmScout contacts your servers on a regular schedule and will notify any designated contact via e-mail when an outage occurs. Uptime statistics are recorded and maintained in the AjmScout database and can be printed or exported for input to your favorite spreadsheet program.