A full packet capturing, indexing, and database system
A fancy self-hosted monitoring tool
Open Source Monitoring System for performance and availability.
Nagios Open Source network monitoring software - The Standard In ITM
free netflow analyzer
Xplico is a Network Forensic Analysis Tool (NFAT)
Easily monitor network infrastructure services
Real time monitoring for embedded devices
Real time monitoring : RPi-Monitor always keep an eye on your computer
Is your host up or down?
A simple cacti viewer for smartphones
Web based management tool for unixes