IPHost Network Monitor is a free network and server monitoring software for tracking of performance and availability of network equipment, web/intranet sites/applications via SNMP (UNIX/Linux/Mac) and WMI, HTTP, Oracle, MySQL, MS SQL, ODBC, FTP, SMTP, POP3, IMAP, PING & more. Custom scripts or programs as monitors, including Nagios plugins. SNMP MIB. Admin tools. Regular reports by email. The free version can be used with up to 50 monitors.