Serial Port Control
Software developers can access various devices by utilizing the Windows API. When using an API, you gain access to a full spectrum of available features, but API programming is a very tough and time-consuming task. You have to study the documentation and you have to create all the... Just put it on a form and you have all the functionality you need to access a serial port, either physical or virtual. ... Serial Port Control automatically enumerates all the ports available in the system. ... We recommend you give Serial Port Control from FabulaTech a try.
http://www.serial-port-control.com/serial-port-control.zip - 561Kb - Download - Screenshot

AlarIT Virtual Serial Driver (AVSD)
AlarIT Virtual Serial Driver is appointed for emulation of one, two or more (up to 200) serial streams. Hardware devices are not necessary. This product is based on Windows XP DDK and doesn't require using devices of other manufacturers. The whole product is created with the help of Microsoft... AlarIT Virtual Serial Driver realizes full emulation of Serial Port functions, connected with each other with the help of NULL-MODEM or full cable, including DTR, CTS, DSR, RTS. ... AlarIT Virtual Serial Driver can be interesting for software (for Windows Platforms) developers, who use external...
http://www.alarit.com/downloads/products/avsd.zip - 448Kb - Download

Multicom.Net
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... Net 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.intellidriver.com/downloads/products/multicomnet.zip - 283Kb - Download

Windows Std Serial Comm Lib for PowerBASIC
MarshallSoft serial communication component PowerBASIC library (DLL) for serial port (RS-232. RS-422, RS-485) communications. Features of the Windows Serial Communications Library (WSC4PB) include: Uses the standard Windows API to communicate with any device connected to a serial port. ... Supports virtual serial ports (usb to serial converter, bluetooth serial); multi-tasking, Includes 32-bit (WSC32. ... Programmer's, Reference, Users and Serial Comm Manuals provided. ... State driven Xmodem and Ymodem on multiple ports simultaneously (up to 256 connections).
ftp://ftp.marshallsoft.com/pub/windows/wsc4pb42.zip - 345Kb - Download - Screenshot

Windows Std Serial Comm Lib for Xbase++
MarshallSoft serial communication component Xbase++ library (DLL) for serial port (RS-232. RS-422, RS-485) communications. Features of the Windows Serial Communications Library (WSC4XB) include: Uses the standard Windows API to communicate with any device connected to a serial port. ... Supports virtual serial ports (usb to serial converter, bluetooth serial); multi-tasking, Includes 32-bit (WSC32. ... Programmer's, Reference, Users and Serial Comm Manuals provided. ... State driven Xmodem and Ymodem on multiple ports simultaneously (up to 256 connections).
ftp://ftp.marshallsoft.com/pub/windows/wsc4xb42.zip - 327Kb - Download - Screenshot

Windows Std Serial Comm Lib for dBase
MarshallSoft serial communication component Visual dBASE library (DLL) for serial port (RS-232. RS-422, RS-485) communications. Features of the Windows Serial Communications Library (WSC4DB) include: Uses the standard Windows API to communicate with any device connected to a serial port. ... Supports virtual serial ports (usb to serial converter, bluetooth serial); multi-tasking, Includes 16-bit (WSC16. ... Programmer's, Reference, Users and Serial Comm Manuals provided. ... State driven Xmodem and Ymodem on multiple ports simultaneously (up to 256 connections).
ftp://ftp.marshallsoft.com/pub/windows/wsc4db42.zip - 339Kb - Download - Screenshot

Windows Std Serial Comm Lib for FoxPro
MarshallSoft serial communication component Visual FoxPro library (DLL) for serial port (RS-232. RS-422, RS-485) communications. Features of the Windows Serial Communications Library (WSC4FP) include: Uses the standard Windows API to communicate with any device connected to a serial port. ... Supports virtual serial ports (usb to serial converter, bluetooth serial); multi-tasking, Includes 16-bit (WSC16. ... Programmer's, Reference, Users and Serial Comm Manuals provided. ... State driven Xmodem and Ymodem on multiple ports simultaneously (up to 256 connections).
ftp://ftp.marshallsoft.com/pub/windows/wsc4fp42.zip - 331Kb - Download - Screenshot

Windows Std Serial Comm Lib for Delphi
Serial communication component Delphi library (DLL) for serial port (RS-232. RS-422, RS-485) communications. Features of the Windows Serial Communications Library (WSC4D) include: Uses the standard Windows API to communicate with any device connected to a serial port. ... Supports virtual serial ports (usb to serial converter, bluetooth serial); multi-tasking, Includes 16-bit (WSC16. ... State driven Xmodem and Ymodem on multiple ports simultaneously (up to 256 connections). ... Programmer's, Reference, Users and Serial Comm Manuals provided.
ftp://ftp.marshallsoft.com/pub/windows/wsc4d42.zip - 392Kb - Download - Screenshot

Easy Control
Basic like script engine for building Windows applications, targeted to serial and TCPIP comms. Can handle not only basic tasks like open/close ports, write/read data, but more, like waiting for specific data to be received, process data, sending data in various modes. ... It has a free tool, Rack Designer, to easily design virtual instruments that can be used to build a cheap but versatile platform for virtual instrumentation. ... It is the perfect tool for microcontroller hobbyists to debug, control their serial devices, even from a remote PC.
http://www.easyvitools.com/download/ezctrl20.zip - 861Kb - Download - Screenshot

Windows Std Serial Comm Lib for C/C++
Serial communication component C/C++ library (DLL) for serial port (RS-232. RS-422, RS-485) communications. Features of the Windows Serial Communications Library (WSC4C) include: Uses the standard Windows API to communicate with any device connected to a serial port. ... Supports virtual serial ports (usb to serial converter, bluetooth serial); multi-tasking, Includes 16-bit (WSC16. ... State driven Xmodem and Ymodem on multiple ports simultaneously (up to 256 connections). ... Programmer's, Reference, Users and Serial Comm Manuals provided.
ftp://ftp.marshallsoft.com/pub/windows/wsc4c42.zip - 569Kb - Download - Screenshot