TraceMAC is a command-line Layer 2 traceroute for Cisco switches
TraceMAC is a Windows/Linux command-line tool that allows you to trace a specific MAC address thru Cisco switches.
It works by connecting to a switch using SSH, SNMP, Telnet, HTTP or HTTPS and do some "show commands" and later process the output, this will happen recursively until it finds the switch where that MAC address (PC/Printer/Etc) is directly connected.
zimg generates png / jpeg images from arbitrary formatted 2-D ascii or binary data. zimg is a command line tool and suitable for rendering large amounts of 2-D data. zimg is highly configurable via command line switches and dynamically loadable objects.
ntrc (Network TRace Converter) is a command-line tool that allows conversion of network packet traces to and from different formats such as TSH, ns-2 TrafficTrace, tcpdump, etc. Written entirely in C, ntrc is particularly efficient with large traces.