1)   tcpdump for Windows 3.9.8 build 4.1
TCPDUMP for Windows is a clone of TCPDUMP for UNIX systems, the popular command-line packet capture tool. An advantage of TCPDUMP for Windows is that (1) it supports 1Gbit networks and (2) it is portable, i.e. it works from removable devices.

 2)   PacketStuff Network Toolkit 0.1
PacketStuff Network Toolkit contains a set of very well-known tools for network analysis, fingerprinting, trafiic monitoring, etc. All these tools may be launched from any (removable) disk without installation of WinPCap beforehand.

 3)   PRTG Network Monitor 7.0.6.1172
An advanced network monitoring solution which monitors network up/downtime, traffic and usage. Features include: SNMP, WMI, Packet Sniffing, NetFlow, instant network failure alerts, in-depth analysis and reporting and more.