Share Serial Ports
Share Serial Ports is an advanced utility, the purpose of which is to share real serial ports between multiple applications in the way, that all applications will receive same data from real serial port simultaneously. Shared Serial Ports can be used for serial port emulation, as it connects... Sharing a serial port is trully effective and reliable with Shared Serial Ports. ... All virtual serial ports will be able to send data to real serial port. ... Each application will think that it is working with serial port in exclusive mode.
http://www.mks.zp.ua/serial_share.exe - 2Mb - Download - Screenshot

Advanced Virtual COM Port
Advanced Virtual COM Port is the first software of its kind which includes both local and network virtual COM port functions. It can share your real COM ports or it can create virtual COM ports and connect them with a virtual null-modem cable locally or through a TCP/IP network or the Internet. ... You can connect to a shared port and use it just like it is on your machine. ... Virtual serial ports created by the program look and work the same way as real ones look and work.
http://www.advancedvirtualcomport.com/files/AdvancedVirtualComPort.zip - 1Mb - Download - Screenshot

Serial Port Mapper
Serial Port Mapper allows you to map any serial ports to any other serial ports. For example you install additional serial port expansion card to computer as COM7 serial port but your favorite software can work with COM1... COM4 ports only. To resolve this problem you can use Serial Port Mapper... Now your software can open COM1 port (or COM2... ... COM4) but actually work with new COM7 port. ... Configuration via command line interface is available as well. ... COM4.
http://www.serial-port-mapper.com/serial-port-mapper.zip - 609Kb - Download - Screenshot

Advanced Port Scanner
Advanced Port Scanner is a small, very fast, easy-to-use and robust port scanner for the Win32 platform. It is multithreaded, so on fast machines you can scan ports in very a few seconds. It has descriptions for the common ports and can perform scan on predefined port ranges.
http://www.radmin.com/download/pscan12.exe - 533Kb - Download - Screenshot

Virtual Serial Ports Driver CE
Virtual Serial Ports Driver CE creates up to 20 pure virtual serial ports in your mobile system, this results in up to 10 virtual serial ports pairs. Each pair has 2 ports that are virtually connected to each other. For other applications, virtual serial ports will be seen exactly as two real... In this case all data sent by other applications to virtual serial port COM5 (VSP0) will arrive at virtual serial port COM6 (VSP9), and all data sent to virtual serial port COM6 will arrive at virtual serial port COM5 (VSP0).
http://www.eltima.com/download/vspdce.exe - 432Kb - Download - Screenshot

FreePortScanner
Free Port Scanner is a small, fast, easy-to-use and robust port scanner for the Win32 platform. You can scan ports on fast machines in a few seconds and can perform scan on predefined port ranges. This tool uses TCP packets to determine available hosts and open ports, service associated with... The tool is designed with a user-friendly interface and is easy to use.
http://www.nsauditor.com/freeware/downloads/FreePortScanner.exe - 518Kb - Download - Screenshot

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... Finally, one program works with one virtual port, the other one with another port and so on, but in fact all of them work with the same split real port. ... In case of read-only ports you won't be able to write anything to the port, only data retrieval is possible.
http://www.virtualserialport.com/download/serial_splitter_mobile.exe - 147Kb - Download - Screenshot

Fast Port Scanner
Fast Port Scanner is a fast multithreaded port scanner that scans about 400 ports a second. It supports both the TCP/IP and UDP protocols. You can select address ranges to scan multiple interfaces or hosts. Any open ports will have the any suspect Trojans listed with it. ... This program is free when using Global Up Time website monitoring service.
http://www.globalwebmonitor.com/software/FastScannerSetup.exe - 636Kb - Download - Screenshot

Virtual Serial Port Control
If there is a task to provide interaction between communications application and your own program (e. g. serial device emulator), there is no common solution to accomplish it. It is considered that communications applications are intended to work only with hardware serial devices connected to... At the same time Virtual Serial Port Control immediately notifies your application about any actions done by communications application with serial port (port opening/closing, setting DTR/RTS handshake, baud rate setting, XON/XOFF symbols setting, etc).
http://www.virtual-serial-port-con...m/virtual-serial-port-control.zip - 790Kb - Download - Screenshot

Virtual Serial Port Driver XP4.5
Virtual Serial Ports Driver XP 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 user-friendly GUI and on-the-fly help of Virtual Serial Port Driver XP it's very easy to configure a virtual serial ports pair. ... With virtual ports created by Virtual Serial Port Driver XP you can connect applications to each other and exchange data between them without occupying your real serial ports and using hardware wiring.
http://www.mks.zp.ua/vspdxpd.exe - 1Mb - Download - Screenshot