Serial Splitter is an advanced Win32 application, based on Windows NT kernel drivers technology. It allows you to share real serial port between several applications in such a way, that all applications will receive same data from real serial port simultaneously. It is achieved by creating virtual serial ports, which are same copies as real one. Every application will think that it is working with serial port in exclusive mode. One of them will be able also to send data to real serial port.
Virtual Serial Ports Driver creates two virtual serial ports which are virtually connected to each other. To Windows applications, these ports will be seen as two real serial ports connected via null-modem cable. E.g. you can create virtual pair COM5-COM6 and all data sent to COM5 will arrive at COM6, and all data sent to COM6 will arrive at COM5. With VSPD you can connect one application to another using virtual serial port pairs. This can be used for GPS simulation programs for example.
Share - GpsGate lets you share one GPS between several applications. GpsGate can create any number of virtual serial ports which most NMEA enabled GPS applications can connect to.