free netflow analyzer
REST interface and configuration GUI for Nagios
Webinterface to (un)ban IPs in Fail2Ban
PotHead
Visual Network Management System
A SNMP agent for Cacti
single file multi-purpose multi-platform shell written in php
BGPHist stores MP-BGP updates activity and history into a database.
A simple cacti viewer for smartphones
Centreon Hypervisor for multiple Nagios Poller via FTP
Show server load-average chart and run pre-define command remotely
Easy to use web front-end for NAGIOS / ICINGA also CD installer
AlertOnFailure was inspired by XYmon, a Big Brother Compatible Monitor