With Serial Splitter Mobile by Eltima you can split real or virtual serial port into several others, join several serial ports into one, share its dataflow between applications and even disable existing com ports.

Advanced Port Scanner is a small, fast, easy-to-use and robust port scanner for the Win32 platform. It is multithreaded, so on fast machines you can scan ports in very a few seconds.

Parallel Port Viever shows you how parallel port works on hardware level. You can see when it is 5 Volts on it's pins.

Free Port Scanner is a small and fast port scanner for the Win32 platform. You can scan ports on fast machines in a few seconds and can perform scan on predefined port ranges.The tool is designed with a user-friendly interface and is easy to use.

It is a software-based solution that allows you to share serial port devices over TCP/IP network turning your computer into low-cost terminal server. So, any serial port device connected to COM port could be accessed from anywhere in the world.

Serial Port Sniffer is a powerful advanced ActiveX Control that allows your application to sniff (fully monitor and edit data flows) serial port in your system. Serial data streams can be easily monitored and edited directly from your application.

Tar98 is a Windows application that reads and writes UNIX TAR tapes and files.

Serial Com Port Monitor was designed for RS232/422/485 COM ports monitoring. It monitors, displays, logs and analyzes all serial port activity in a system and solves problems of debugging computer connection with peripheral devices using COM port.