KSermon is an system-utility to watch the activities on a given serial port. The current state of the TX, RX, CTS, RTS, DTR, DSR, DCD, and RI lines are shown by some kind of LEDs. 1.2 PingCheck is a network monitoring tool written in Perl. Sysmon is a network monitoring tool designed to provide high performance and accurate network monitoring. Network UPS Tools is setting out to monitor every kind of UPS with sufficient interest behind it.
Many models have serial ports that allow monitoring of some kind.
While the feature sets vary wildly, there is a compatibility layer that lets them all get along. Useful features like safe shutdowns and live web monitoring have been built on top of this foundation. You can also have many systems running different operating systems monitoring a single physical UPS thanks to the network communications layer. It shows a process list, details of seleted processes, cpu, memory and swap usage, and history. It can also browse processes and statistics about remote networked computers.