Shared Serial Ports - HHD is described as 'Serial port splitting software for easy sharing of one serial device among several applications' and is an app. There are 2 alternatives to Shared Serial Ports - HHD for Windows. The best Shared Serial Ports - HHD alternative is Null-modem emulator, which is both free and Open Source.
The Null-modem emulator (com0com) is a kernel-mode virtual serial port driver for Windows. You can create an unlimited number of virtual COM port pairs and use any pair to connect one COM port based application to another.
Shared Serial Ports is an advanced utility, the purpose of which is to share real serial ports between multiple applications in the way, that all applications will receive same data from real serial port simultaneously.
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