[ Thanks to Lee Schlesinger for this link. ]
With Xymon, you can monitor the health of thousands of
servers and applications, and the network connectivity among them.
Xymon presents its results in an intuitive way, which simplifies
life for data center operations staff. Formerly known as Hobbit
Monitor, Xymon is inspired by the monitoring tool Big Brother, but
that older application is based on shell scripts and lacks a
centralized location for storing configurations. Xymon, by
contrast, stores its configuration information on a single Xymon
server, which makes it more manageable.