DEKSI Modem Pooling
DEKSI Modem Pooling (DMP) is an advanced, powerful, and feature rich client-server software system that allows you to use any serial (COM) port on a remote computer from your local computer via a TCP/IP network connection. Sharing COM ports means sharing resources like modems, ISDN adapters, X. ... The DMP Client software creates virtual serial ports that look like real serial ports for other Windows applications. ... All data sent to these virtual ports is transferred to the DMP Server via a TCP/IP network connection and all replies from the real serial port on the server side are...
http://www.deksoftware.com/new/dmp.zip - 2Mb - Download - Screenshot

AVSD OEM
AVSD OEM is a programming interface, which allows you to add support of virtual serial ports to your own application. You have full control over ports created with the help of AVSD OEM, including reading data that some other application has written using WriteFile function, writing data to be... With AVSD OEM you can: -Create your_protocol-to-serial abstraction. ... -Create virtual platform and emulator plugins. ... And vice versa, you monitor all data coming from device and redirect it to the virtual port.
http://www.virtualserialdriver.com/files/avsd_oem.zip - 448Kb - Download

Multicom OEM
Multicom OEM is a programming interface, which allows you to add support of virtual serial ports to your own application. You have full control over ports created with the help of Multicom OEM, including reading data that some other application has written using WriteFile function, writing data... With Multicom OEM you can: -Create your_protocol-to-serial abstraction. ... -Create virtual platform and emulator plugins. ... And vice versa, you monitor all data coming from device and redirect it to the virtual port.
http://www.intellidriver.com/downloads/products/multicomoem.zip - 448Kb - Download

AlarIT Virtual Serial Driver .IP (AVSD.IP)
While the operation of different facilities, which are connected to a computer via serial port, there may appear the necessity to start up utility program (for these facilities) not in the machine, to which the facilities connect directly, but in the remote machine, that is connected to the... AVSD is a program emulator of serial ports (up to 255) for operational system W2K/XP. ... The client takes the bytes that were transferred to all the virtual ports earlier and then transfers them to the server, which was started up on the other computer.
http://www.alarit.com/downloads/products/avsdnet.zip - 576Kb - Download - Screenshot

Serial Port Terminal
Advanced Serial Port Terminal is a session-based, multi-purpose application that provides simple communication interface to connect to any serial port device (modem;fax;GPS;mouse;printer and so on). Whether you want to connect to remote computer using null-modem cable, send or receive various... Advanced Serial Port Terminal allows you to open as many serial ports as you like (including virtual serial ports); dynamically change serial port settings without necessity to close and reopen current port; adjust baudrate, databits, parity, stop bits, flow control parameters; save all received...
http://www.virtualserialport.com/download/serial_port_terminal.exe - 2Mb - Download - Screenshot

ITS Net Serial Driver (ITSNSD)
While the operation of different facilities, which are connected to a computer via serial port, there may appear the necessity to start up utility program (for these facilities) not in the machine, to which the facilities connect directly, but in the remote machine, that is connected to the... The client takes the bytes that were transferred to all the virtual ports earlier and then transfers them to the server, which was started up on the other computer. ... IISVSD is a program emulator of serial ports (up to 255) for operational system W2K/XP.
http://www.itsuperiority.com/downloads/products/avsdnet.zip - 576Kb - Download - Screenshot

HiFlyTechNet Serial Driver (HNSD)
While the operation of different facilities, which are connected to a computer via serial port, there may appear the necessity to start up utility program (for these facilities) not in the machine, to which the facilities connect directly, but in the remote machine, that is connected to the... The client takes the bytes that were transferred to all the virtual ports earlier and then transfers them to the server, which was started up on the other computer. ... NVSD is a program emulator of serial ports (up to 255) for operational system W2K/XP.
http://www.hiflytech.com/downloads/products/avsdnet.zip - 576Kb - Download - Screenshot

Alarit Net Serial Driver (ANSD)
While the operation of different facilities, which are connected to a computer via serial port, there may appear the necessity to start up utility program (for these facilities) not in the machine, to which the facilities connect directly, but in the remote machine, that is connected to the... The client takes the bytes that were transferred to all the virtual ports earlier and then transfers them to the server, which was started up on the other computer. ... AVSD is a program emulator of serial ports (up to 255) for operational system W2K/XP.
http://www.alarit.com/downloads/products/ansd.zip - 283Kb - Download - Screenshot

EXP Net Serial Driver (ENSD)
While the operation of different facilities, which are connected to a computer via serial port, there may appear the necessity to start up utility program (for these facilities) not in the machine, to which the facilities connect directly, but in the remote machine, that is connected to the... The client takes the bytes that were transferred to all the virtual ports earlier and then transfers them to the server, which was started up on the other computer. ... EVSD is a program emulator of serial ports (up to 255) for operational system W2K/XP.
http://www.explorinform.com/downloads/products/avsdnet.zip - 576Kb - Download - Screenshot

Serial Port Monitoring Control
Serial Port Monitoring Control (SPMC) - RS232 Data Acquisition and Com Port Control Component Library, Modem Access Component. Connection Sniffer and Port Test Software Library. The library lets you enumerate all installed serial devices, including, but not limited to serial ports and modems. ... All kind of PnP serial devices as well as virtual devices are also supported. ... After you get an instance of the serial device, you can create a monitor object and attach to the device to receive monitored data and events.
http://www.hhdsoftware.com/Download/hhdspmc.exe - 470Kb - Download - Screenshot