Community-based GPL-licensed network monitoring system
A network security analysis and monitoring toolkit Linux distribution.
Enhanced Apache Server Status page - for one or multiple servers
Firewall log analyzer
The professional way to manage your WiFi network using FreeRADIUS
Xplico is a Network Forensic Analysis Tool (NFAT)
PCAP from another point of view
Open Source SIEM
The Simplest Multi-User Latency Monitoring Web App
A SNMP agent for Cacti
web front-end for vnstat
Monitoring your infrastructure for free.