Vote for ipMonitor
ipMonitor delivers availability monitoring so that you always know what’s happening with your applications, servers, and network devices. With a built-in database and Web server, you don’t need to install anything but ipMonitor.
ipMonitor simplifies network management by: Discovering IP-based network devices and automatically recommending monitoring settings for each device; Performing monitoring of Active Directory, DNS, Microsoft Exchange, FTP, Web, IMAP, MS SQL Server, SMTP, and more; Monitoring end-user experience with synthetic transactions; and more...