NetVizura NetFlow Analyzer - NetFlow Analyzer is a solution for bandwidth monitoring and traffic analysis. It helps with traffic investigation, analysis and reporting
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!
Zabbix - Track, record, alert and visualize performance and availability of IT resources
BLËSK - BLËSK is a suite of applications for network monitoring and management.
Nfsen - NfSen is a graphical web based front end for the nfdump netflow tools that allows you to:
Nagios - Complete monitoring and alerting for servers, switches, applications, and services