Nagios Open Source network monitoring software - The Standard In ITM
Community-based GPL-licensed network monitoring system
Open Source Monitoring System for performance and availability.
VoIP SIP and SKINNY quality analyzer and packet / audio recording tool
Monitoring and reporting web gui for Bacula
Enhanced Apache Server Status page - for one or multiple servers
Firewall log analyzer
Enterprise-class, distributed monitoring solution for networks & apps
The open source grid computing solution
PHP-based looking glass for Cisco, Juniper & Zebra/Quagga routers
OPTOSS Next Gen Network Management System (NG-NetMS)
Pinger alert, STATICTICAL TABLES, send EMAILs or SMS by SMS GATEWAY
A client for the MikroTik RouterOS API protocol, written in PHP.
Track your ARP/MAC table changes and so much more
Open source tool to monitor your servers and websites
Open Source SIEM
Netflow visualisation and investigation tool
DOCSIS network management