Scrutinizer NetFlow Analyzer is a free software application that provides incredibly detailed network utilization information for the hosts and applications using the most bandwidth. Using Cisco NetFlow Technology and the sFlow standard, Scrutinizer is able to retrieve the traffic details you need and present them in a detailed graphical view. Recent updates to Scrutinizer includes New Mapping, IP Groups, Report Designer, Virtual and Harware Appliances, Advanced Reports Module, Improved ASA Support.