Zabbix
SmokePing
RRDtool
Big Sister
Nagios
Pandora FMS
Performance Co-Pilot
Network Weathermap
Icinga
RANCID monitors a router's (or more generally a device's) configuration, including software and hardware (cards, serial numbers, etc) and uses CVS (Concurrent Version System) or Subversion to maintain history of changes.
GitHub - ssinyagin/gerty A universal framework for device management automation. Eventually a replacement for RANCID… and much more. (last commit Jan 11, 2017).
Xymon
GitHub - Netdata
Torrus s an alternative software platform to MRTG, Cricket and Cacti. In most cases it brings more flexibility and performance. We are able to poll 1 million SNMP OIDs every 5 minutes from a modern server.
NfSen is a graphical web based front end for the nfdump netflow tools. (License: BSD)
Flow-tools is a software package for collecting and processing NetFlow data from Cisco and Juniper routers.
AreWeDown.com (dead links) service that runs on XP workstations, Windows 2000 workstations/servers, and Windows 2003 servers. The service logs database requests to a MySQL server every 30 seconds.
NetAdminTools.com (dead links) represents the world of network administration in a pleasant way, particularly for those who find the idea of monitoring systems with red seven-segment displays, LEDs, and green/amber text written in courier. NetAdminTools.com is simply a console that accepts commands from localhost on port e (27183).
23rd Chaos Communication Congress - A 10GE monitoring system
24th Chaos Communication Congress - 10GE monitoring live!
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