Netjini Plus Traffic Analyzer
See the standard RMON statistics for your whole network segment. ? Traffic matrix and chart (shows traffic between stations/hosts) ? Host table and chart (shows traffic by host) ? TCP/UDP port table and chart (shows activity by port) Distribution ? MAC layer octet distribution ? ... which device generate erronious trafic g. ... which application generate most trafic c. ... which device generate most trafic b. ... which devices generate most trafic (conversetaion monitor) d. ... HTTP(S) octet rate ?
http://www.cbr.com.tr/cbr/netjiniplus/eng/netjiniplus_eng.exe - 16Mb - Download - Screenshot

I-Worm.Sobig.F Virus Stopper
Now is the peak of Sobig virus epidemic. The worst thing is that you have to download tons of unwanted messages that infected by this virus. This program is intendend to help you to deal with this infected flood. Of course, The right solution is to set up PROCMAIL (or whatever you use) on your... This program uses a simple algorithm that significantly reduces the trafic from your mail server to your computer and still prevents you from downloading infected messages. ... Please, note that this program will detect ONLY I-Worm.
http://www.bytegems.com/files/SobigVirusStopperSetup.exe - 448Kb - Download - Screenshot