Packet Storm
Freeware
Netspear is a web based database backend for nmap.
Syhunt
109
Freeware
Free port scanner for analyzing network security or Internet exploration.
Nmap custom build
Open source
NmapConsole it is a application for exploration or security auditing.
12
Mikel Elkano Ilintxeta
45
Open source
jNetPort is a complete active monitoring and network status display tool.
789
Riverbed Technology
1,052,261
Freeware
WinPcap is a tool to allow applications to capture and transmit network packets.