1. http://www.monitortools.com/freeware/
2. http://www.adremsoft.com
3. http://www.gfi.com/products-and-solutions/network-security-solutions/gfi-network-server-monitor
4. http://www.monitortools.com/traffic/
5. http://sourceforge.net/p/xymon/code/HEAD/tree/trunk/
6.http://www.openxtra.co.uk/blog/top-5-open-source-netflow-analyzers/
7.http://www.sevone.com//download
8.http://wvnetflow.sourceforge.net/
9.http://www.whatsupgold.com/products/download/network-software-download.aspx