Virtual Serial Port Driver allows creating virtual serial port pairs on a PC.
The SoftPerfect Switch Port Mapper tool works with managed network switches.
Simple Port Tester is a neat application created to test TCP and UDP ports.
Process And Port Analyzer is a packet viewer and sniffer.
Active Ports monitors all open TCP and UDP ports on a local computer.
HHD Software, Ltd.
It allows you to create virtual serial ports and emulate their behavior.
ELTIMA Software GmbH
It ensures simultaneous,high-speed,bi-directional connection to RS232 port.
Flachmann & Heggelbacher
Establishes TCP connections, accepts a TCP connection on a local port, etc.
Cisco Systems, Inc.
Cisco Unity Port Status Monitor is a remote connection utility.
TCPCOM32 is designed to be a serial port to TCP/IP connection mapper.
This plugin opens a Serial Port connection with your serial peripheral .
Is a tool which allows you to establish a 802.3 connection over a serial port.
Shreeharsha Perla & Veena Pai
PC to PC Communication via RS232 port. Chat with only 3-wire connection.