Windows ports of ethereal,nmap,ngrep,tcpdump, and other popular network tools.

PacketStuff Network Toolkit contains a set of very well-known tools for network analysis, fingerprinting, trafiic monitoring, etc.: ethereal, nmap, ngrep, tcpdump... All these tools are compiled with Packet Sniffer SDK, so you can launch them from any (removable) disk. Installation of the WinPCap is not required. Download, unzip, and run.