Virtual Serial Port Driver 9x
Virtual Serial Ports Driver (VSPD) is a Windows device driver. Using it you can create two virtual serial COM ports in your system which will be virtually connected to each other. For example, after installing VSPD, you will have Virtual Serial Port COM5 and Virtual Serial Port COM6 added to... These ports will behave like real common serial ports to other Windows applications. ... These ports will not interact with any hardware. ... So, the application, that listening COM5 will get all data, sent by other application to COM6 and vice versa.
http://www.virtualserialport.com/download/vspd2demo.exe - 489Kb - Download

Serial Splitter Mobile
Serial Splitter Mobile by Eltima for Windows Mobile 2003/2005 operating systems is a new generation of professional system utilities for mobile devices. This is the software for splitting real serial ports into virtual ones. It can be useful if you need several applications to work with the same... Serial Splitter Mobile can create up to 20 virtual ports for real ports splitting - COM0-COM9, VSP0-VSP9. ... The essential feature is disabling existing serial ports (for instance, COM1 may be used by other device and isn't free therefore) to spear a slot for virtual one and use it for your needs.
http://www.virtualserialport.com/download/serial_splitter_mobile.exe - 147Kb - Download - Screenshot

Virtual Serial Port ActiveX CE
Virtual Serial Port ActiveX CE is a powerful ActiveX Control for Embedded platforms that allows your software to create custom additional virtual serial ports in Windows CE system and fully control them from within your own program. Virtual serial ports you will create look and work absolutely... From your application you can control data sent to virtual serial port by other applications and respond to them by sending your own data to virtual serial port, which will be received by other Windows CE applications as if it was sent from a real serial port by a hardware device (GPS module, for...
http://www.serial-port-communication.com/download/vspaxce.exe - 829Kb - Download - Screenshot

Virtual Serial Ports Driver
Virtual Serial Port Driver by Virtual Serial Port Software, department of Eltima, is a sophisticated software solution aimed to create two pure virtual serial ports virtually connected to each other in your system. Therefore, without additional hardware installation you may use extra serial... Unlike standard physical serial ports, virtual ports can be assigned any number and you can create as many virtual serial port pairs in your system as you want. ... Deploying virtual COM ports you can do the same you do with the real one and for other windows applications they will be seen exactly as...
http://www.virtualserialport.com/download/vspdxp.exe - 2Mb - Download - Screenshot

Virtual Serial Ports Driver XP
Virtual Serial Ports Driver (VSPD) creates two pure virtual serial ports in your system which are virtually connected to each other. For other Windows applications, virtual ports will be seen exactly as two real serial ports connected via null-modem cable. ... With VSPD you can connect one application to another using virtual serial ports pair. ... Of course, you can transfer files, other data or do whatever you want as it was real serial ports. ... For example, you can create virtual pair COM5-COM6.
http://www.eltima.com/download/vspdxp.exe - 1Mb - Download - Screenshot

Network Serial Port Kit
Network Serial Port Kit allows you to connect any serial port devices over the TCP/IP network or Internet. Creation of local virtual serial ports pairs are available as well. Program creates up to 254 virtual serial ports at a time. Physical COM ports located on remote computer can be connected... You can connect data collection serial devices: bar code scanners, modems, sensors, meters, gages, RF equipment, telephone PBX systems, laboratory or industrial instruments, and so on - to the serial ports of your computer to deliver that data anywhere over any TCP/IP based network.
http://www.network-serial-port.com/network-serial-port-kit.zip - 980Kb - Download - Screenshot

Virtual Null Modem
Null-modem cable is basically used for communication of two RS-232 DTE devices with each other. To create null-modem connection between the devices you need to use two computers or two serial ports of a single computer connected with null-modem cable. ... The most reliable way to create null-modem connection is using of virtual serial ports emulated by virtual serial port driver and null-modem cable. ... It is possible to create the unlimited couples of virtual serial ports on a single PC and connect them in any sequence using virtual null-modem cable.
http://www.virtual-null-modem.com/download/vnullmod20.exe - 1Mb - Download - Screenshot

Serial Port Redirector
Serial Port Redirector is used to connect a serial application to a remote TCP socket. This allows you to utilize modern hardware COM servers without changing your software or exchange data between a TCP/IP application and an old-fashioned program that can only connect to a serial port. ... With Serial Port Redirector, you can easily control remote hardware COM servers via a TCP/IP network from your serial application designed to work with locally connected devices only. ... If you wish to use your old serial applications to analyze the data or control the devices, you will need a tool...
http://www.serial-port-redirector.com/serial-port-redirector.zip - 772Kb - Download - Screenshot

Virtual Serial Port SDK
Using Virtual Serial Port SDK you can create a "new" serial port on your computer. This serial port is completely controlled by your application. Other 3rd party applications can connect to this serial port and believe it is a normal physical port. In this way you can emulate all kinds of... Virtual Serial Port SDK is available for . ... 0 are included. ... NET and VisualBasic 6. ... NET and ActiveX, on all Windows platforms Windows Mobile/Pocket PC, Windows XP/2k/NT and Windows ME/98. ... Samples in C#, VB.
http://franson.com/serialtools/SerialToolsSDK.zip - 2Mb - Download

datAxe TCP IP serial data converter
datAxe is a flexible converter to solve all your needs between serial data and TCP/IP networks on Windows computers. datAxe software package makes serial data from your PC available on TCP/IP-based networks and makes TCP/IP data available on physical and virtual serial ports of your PC. ... duplAxe component of datAxe makes it possible to build and start up virtual serial port pairs (COM port pairs) to enable also your local applications to exchange serial data directly with each other. ... With datAxe you can also create virtual ports and configure them to communicate with TCP/IP-networks.
http://www.labf.com/download/dataxe.exe - 4Mb - Download - Screenshot