Unnoc is a NOC application designed to integrate
traffic graphs (RRDTool) with SNMP host monitoring. It uses native SNMP to monitor servers, wireless access points, routers, firewalls, UPSs, switches, or anything else that is SNMP-enabled. It will send out email messages
if things go down or something goes wrong. It will
graph network traffic, disk usage, processes, load
averages, and memory usage. All graphs are
implemented using RRD. It also supports VMWare Virtual Infrastructure 3 (VI3, ESX, and VCMS), Barracuda SPAM Firewalls, Cisco Aironets, Apple Airports, APC UPSs, and more.