com port

Port Magic is a port scan detector

Use Port Listener as a free lightweight utility to listen on the specified port.

Infinitely port forwarding until the destination is achieved.

Lock your USB port with simple click.

Infinitely port forwarding until the destination is achieved.

change and reporting tool for COM+/MTS/DCOM components

The title of this recipe contains the two words that gave the inspiration

RS232 Serial Data Logger

split COM port, open COM port by several applications

Monitor data received from and sent to a COM port in manual, auto or spy modes!