Tools for network monitoring

Smokeping - jitter monitoring

Observium - on top of NAGIOS

sFlowTrend - sFlow/netFlow monitoring

http://www.inmon.com/products/sFlowTrend.php


FlowMon - netFlow monitoring
https://www.invea.com/en/products/flowmon

sFlow + LogStash
https://github.com/NETWAYS/sflow

NetFlow Monitoring Tools
http://www.cisco.com/c/en/us/products/ios-nx-os-software/ios-netflow/networking_solutions_products_genericcontent0900aecd805ff728.html