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... IP address of the receiving server, port number and the number of the real serial port on the receiver are specified on the client for each port. ... The use of our product gives you the possibility to give the remote access to serial port via TCP/IP.
http://www.alarit.com/downloads/products/avsdnet.zip - 576Kb - Download - Screenshot

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. ... 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 returned back to the DMP Client, so other applications will receive it as if it was sent from a real serial port.
http://www.deksoftware.com/new/dmp.zip - 2Mb - Download - Screenshot

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... The use of our product gives you the possibility to give the remote access to serial port via TCP/IP. ... Net server is a service which realizes the exchange between a real driver of the serial port and TCP/IP.
http://www.intellidriver.com/downloads/products/multicomnet.zip - 283Kb - Download

EzCom2Web
Lightweight HTTP server and a script engine (like PHP or ASP) in one application . It is a very good tool to control a device connected on a remote PC serial port with a web browser. You can build a complete web interface for your RS232 device, for example for a home automation box, a remote... For other complex tasks PHP script engine can be integrated and used. ... Can be used (running on different ports) together with another web server and script engine, to have a most wanted feature missing or hard to implement feature: accessing remote serial ports.
http://www.easyvitools.com/download/ezc2w_24.zip - 668Kb - Download

Windows Std Serial Comm Lib for Visual Basic
Serial communication component VB and VB. NET library (DLL) for serial port (RS-232. RS-422, RS-485) communications. Features of the Windows Serial Communications Library (WSC4VB) 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. ... Is port re-entrant. ... Programmer's, Reference, Users and Serial Comm Manuals provided. ... Free technical support and updates for one year.
ftp://ftp.marshallsoft.com/pub/windows/wsc4vb42.zip - 411Kb - Download - Screenshot

TVicPort
TVicPort is set of general purpose device drivers that allow you to access and control hardware directly from without using the Windows DDK. TVicPort's main capabilities are: - direct port I/O access; - obtains pointers to the physical memory by directly mapping it to the user process's... - Windows XP 64-bit support. ... ).
http://www.entechtaiwan.com/files/tvicport.zip - 356Kb - Download - Screenshot

MarshallSoft GPS Component for Visual Basic
The MarshallSoft GPS Component VB (MGC4VB) library toolkit reads and decodes industry standard GPS NMEA 183 sentences from the RS232 serial port as well as computing great circle distances and bearings. Features of MGC4C include: The most current GPS data is always available on demand * Runs as... ) * Uses the Windows Win32 API for serial port input - no special Windows driver or support libraries are required * Can also be used with C, C++, C#, Delphi, Visual FoxPro, Visual dBase, Xbase++, PowerBasic and COBOL * Can be ordered with or without C source code for the DLL * Free technical...
ftp://ftp.marshallsoft.com/pub/windows/mgc4vb14.zip - 233Kb - Download - Screenshot

IPCOMServer
IPCOMServer is a cheap and easy solution to control RS-232 devices without the use of expensive router products like a Cisco® 2511 Terminal server. The IPCOMServer acts as a Telnet server, connecting the user directly to a chosen COM port. IPCOMServer can be connected to by either using a Telnet... IPCOMServer acts as a virtual connection between a TCP/IP port or socket and a personal computers Serial/COM port. ... At the host the incoming commands are relayed to the serial port. ... When a Telnet program or client connects to IPCOMServer, it will be connected directly to the serial port...
http://www.tigme.com/software_0004_ipcomserver3.zip - 2Mb - Download

CPS Plus
CPS Plus serial data acquisition software enables serial devices like bar code scanners, magnetic stripe readers, gages, electronic scales, sensors, laboratory instruments and modems to communicate with any Windows application. Supports Com1 to Com8, even multiple serial ports simultaneously! ... Send any ASCII character (s) to serial devices / instruments. ... Input real time data into Excel , Access , statistical software , VB ... ... Transfer serial data either as keystrokes or by DDE into any Windows application.
http://www.programbl.com/cps11.exe - 778b - Download - Screenshot

MarshallSoft GPS Component for C/C++
The MarshallSoft GPS Component C/C++ (MGC4C) library toolkit reads and decodes industry standard GPS NMEA 183 navigation sentences from the RS232 serial port as well as computing great circle distances and bearings. Features of MGC4C include: The most current GPS data is always available on... NET, and C# example programs * Uses the Windows Win32 API for serial port input - no special Windows driver or support libraries are required * Supports Microsoft Visual C/C++ (including VC. ... NET, VBA application (EXCEL, ACCESS, WORD, etc), Visual FoxPro, Visual dBase, Xbase++, PowerBasic and...
ftp://ftp.marshallsoft.com/pub/windows/mgc4c14.zip - 294Kb - Download - Screenshot