VSPD.net 

Network Virtual Serial Ports Driver is an advanced utility, the purpose of which is to emulate null-modem cable on computers located in a TCP/IP LAN or connected to the Internet by creating any number of pure virtual serial ports in your system.
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ByteWedge 

Acquire data from electronic devices through an RS232 interface and input it directly into your database, whether it is MS Access, MySQL or any other ODBC-compliant database. Start collecting data in minutes using the visual step-by-step wizards.
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Serial Port Monitor 

Captures and displays time-tagged text and binary data across a PC serial port, from COM1 to COM12. Supports simultaneous capture to screen, with optional output to file and printer. Three capture modes: single character, line, or string.
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PBX Call Tarifficator Pro 

PBX Call Tarifficator Pro is a call accounting and billing system, which helps you to manage all the telephone traffic via your office switching system. Free demo-version.
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Windows Std Serial Comm Lib for C/C++ 

C/C++ serial communication component library for C++ and .NET programmers. Control multiple ports simultaneously; also works with MFC and C++ Builder. Includes modem control, ANSI emulation, ASCII/XMODEM/YMODEM. Does not depend on support libraries.
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Bill Serial Port Monitor 

To monitor (bi-directional) Serial communication RS-232 between two devices without physical cable, you can use the freeware Bill Serial Monitor. This freeware enable you to view, log, test and analyse the activity of the serial RS-232 port.
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