1)   Virtual Serial Port ActiveX 4.2
Create virtual serial port directly from your application and work with it. Full serial port software emulation. Created virtual serial port looks like real serial port for other Windows applications. Compatible with VB, VC++, C++ Builder and Delphi.
Virtual Serial Port ActiveX Control, virtual serial port, virtual COM port, Virtual Serial Ports, serial port driver, serial port component, virtual port ActiveX,

 2)   AVSD OEM 2.4
AVSD OEM allows creating and managing virtual com ports, emulating serial devices or transfer data over networking.
create virtual serial port, create com-port, manage virtual port, rs232-signals, add support of virtual serial ports, programming interface, fully control, virtual serial ports,

 3)   Virtual Serial Port ActiveX Control 3.0
Create virtual serial port directly from your application and work with it. Full serial port software emulation. Created virtual serial port looks like real serial port for other Windows applications. Compatible with VB, VC++, C++ Builder and Delphi.
virtual serial port, virtual COM port, Virtual Serial Ports, Virtual Serial Ports ActiveX Control,

 4)   Multicom OEM 2.0
With Multicom OEM you can: -Create your_protocol-to-serial abstraction. -Create virtual platform and emulator plugins. -Create usb2serial bluetooth2serial IrDa2serial adapters
add support of virtual serial ports, programming interface, fully control, virtual serial ports,