Advanced USB Port Monitor will allow you to display the packets sent.
A free utility that will read and analyze your native Windows Firewall Log.
It is designed for PC hardware component certification and diagnostic.
Sps is a windows port scanner with many functions.
Bill Serial Port Monitor utility is a Serial RS-232 COM ports monitor.
It's used for controlling and debugging binary and other difficult data streams.
Fully featured oscilloscope,chart recorder,logic analyser and spectrum analyser.
Router Port Forwarding is a port forwarding and port triggering tool for router.
Virtual Serial Port Driver allows creating virtual serial port pairs on a PC.
HW Virtual Serial Port allows creating virual serial port drivers.
Parallel Port PIC Programmer uses PC's parallel port for communication.
COM Port Data Emulator is a tool for emulating a com port or an Ethernet device.
COM Port Stress Test is a tool for testing a COM or RS232 port (device).
1st Net Scanner is a useful IP Finder and Port Finder. It builds IP finder, port finder, IP scanner...
The vnar performs measurements on one port or two port networks.