10 free router and IP admin tools you should know about
Who says network operations has to be expensive?
By Jim Duffy | Network World US | Published: 16:43, 07 January 2013
Angry IP Scanner
Angry IP Scanner is a “very fast” open source IP address and port scanner, according to the angryip.org website. It can scan IP addresses in any range as well as any ports, and can be freely copied and used anywhere. It can also collect NetBIOS information and favorite IP address ranges, among other data, and supports Java plugins for extended functionality.