VoIP SIP and SKINNY quality analyzer and packet / audio recording tool
Nagios network monitoring software is enterprise server monitoring
A network security analysis and monitoring toolkit Linux distribution.
Lighweight CRM, easy to use Kickstarter for web based ERP
The Free & Popular HESK Web Based Software in Complete Virtual Machine
Quick multiple web site traffic monitoring without cookies
Enterprise-class, distributed monitoring solution for networks & apps
centralized syslog-ng monitoring frontend writen in php
PHP-MySQL script to monitor clicks on html elements and advertisements
Open source tool to monitor your servers and websites
Open Source Social Network Kit written in PHP
MySQL Replication Monitor (written in PHP)
Gestione minimale della logistica
Monitor windows servers (temperature, free space, backups)
opensource Virtual Appliance Factory
Php classes for use with different databases.
BGPHist stores MP-BGP updates activity and history into a database.
Open source, web based, SCADA system written in PHP/Javascript & Java
OCD-01 [OSSEC Cool Dashboard]
Kepler is a monitoring system for HPC clusters