A combination terminal/sniffer: Imagine a terminal emulation program, like HyperTerminal or a telnet client. Allow it to send and receive arbitrary binary data in HEX or TEXT form. Pour in ultimate I/O flexibility, allowing it to work with any underlying transport, be it a serial port, TCP/UDP in client or server modes, named pipe or anything else. Add the monitoring capabilities of a network sniffer or a serial monitor. Now sprinkle a dash of style and common sense, and you've got an elegant and powerful tool for debugging almost any communication scenario you can throw at it.
Version 1.8 adds Vista-signed binaries, inactive tab highlighting on events, and event filtering options.
What's new in this version:
Version 1.8.6 is a bugfix release, allowing use of higher COM port numbers and fixing sniffer crashes when hit with malformed packets.