RawCap is a free command line network sniffer for Windows that uses raw sockets.Properties of RawCap:Can sniff any interface that has got an IP address, including 127.0.0.1 (localhost/loopback)RawCap.exe is just 23 kBNo external libraries or DLL's needed other than .NET Framework 2.0No installation required, just download RawCap.exe and sniffCan sniff most interface types, including WiFi and PPP interfacesMinimal memory and CPU loadReliable and simple to use