NetVizura NetFlow Analyzer - NetFlow Analyzer is a solution for bandwidth monitoring and traffic analysis. It helps with traffic investigation, analysis and reporting
BLËSK - BLËSK is a suite of applications for network monitoring and management.
Zabbix - Track, record, alert and visualize performance and availability of IT resources
SolarWinds Log Analyzer - SolarWinds Log Analyzer tool provides comprehensive log management and analysis with out-of-the-box visibility into performance and availability. Free trial!
Nfsen - NfSen is a graphical web based front end for the nfdump netflow tools that allows you to:
Paessler PRTG - An advanced network monitoring solution to monitor network up/downtime, traffic and usage.