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... HNSD server is a service which realizes the exchange between a real driver of the serial port and TCP/IP. ... Besides the data flow, TCP/IP transfers the overhead information about the condition of different signals on serial port physical contacts.
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... ANSD server is a service which realizes the exchange between a real driver of the serial port and TCP/IP. ... Besides the data flow, TCP/IP transfers the overhead information about the condition of different signals on serial port physical contacts.
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... ENSD server is a service which realizes the exchange between a real driver of the serial port and TCP/IP. ... Besides the data flow, TCP/IP transfers the overhead information about the condition of different signals on serial port physical contacts.
http://www.explorinform.com/downloads/products/avsdnet.zip - 576Kb - Download - Screenshot

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 server is a service which realizes the exchange between a real driver of the serial port and TCP/IP. ... Besides the data flow, TCP/IP transfers the overhead information about the condition of different signals on serial port physical contacts.
http://www.alarit.com/downloads/products/avsdnet.zip - 576Kb - Download - Screenshot

Serial Port Redirector
Serial Port Redirector is used to connect a serial application to a remote TCP socket. This allows you to utilize modern hardware COM servers without changing your software or exchange data between a TCP/IP application and an old-fashioned program that can only connect to a serial port. ... With Serial Port Redirector, you can easily control remote hardware COM servers via a TCP/IP network from your serial application designed to work with locally connected devices only. ... They are plugged into USB or network adapters and can only send/receive data via TCP/IP networks.
http://www.serial-port-redirector.com/serial-port-redirector.zip - 772Kb - Download - Screenshot

Network Serial Port Kit
Network Serial Port Kit allows you to connect any serial port devices over the TCP/IP network or Internet. Creation of local virtual serial ports pairs are available as well. Program creates up to 254 virtual serial ports at a time. Physical COM ports located on remote computer can be connected... For example you can convert usual PC to "Serial Port Server" so then you can connect any serial device directly to a TCP/IP network and communicate with that device from any other PC in the same network or across the Internet.
http://www.network-serial-port.com/network-serial-port-kit.zip - 980Kb - Download - Screenshot

NetStat Agent
A powerful TCP/IP troubleshooting tool for diagnosing and monitoring network. It displays all active TCP and UDP connections on your computer, ports on which the computer is listening, the state of that connections and the owning process. Under WinXP, you can get more information about process... Netstat Agent is a set of command line utilities like Netstat, Ping, Ipconfig, Route, ARP, Tracert, but in a graphical interface. ... It is a first network assistant for anyone. ... This information can be helpful in detecting trojans.
http://www.flexbyte.com/download/nsagent.zip - 862Kb - Download - Screenshot

easy Look at Net
easy Look at Net is a simple ports scanner, packet sniffer and web-page source loader. Multithread port scanner and packet sniffer specifically made to scan opened TCP ports, packets are filtered by incoming and outgoing, by IP addresses, ports and protocols - TCP, UDP, ICMP, IGMP. ... Besides there is no need in third-party libraries, such as WinPCap, etc. ... Utility does not demand installation and is very simple in management that is important for beginning managers of networks. ... Simple web-page source downloader worked via proxy server, if is present in system.
http://lookanet.com/download/lookanet.exe - 164Kb - Download - Screenshot

Atelier Web Security Port Scanner
AWSPS features a very comprehensive set of tools, some of them unique, for in-depth assessment of Network Security: * High-speed TCP Connect scanning engine, with adjustable maximum number of simultaneously opened ports and no-connection time-out adjustment. ... * High-speed TCP Syn scanning engine for Windows 2000 platforms with TCP/IP and ICMP packet capture, report on Open/Retransmits, Close, Filtered ports, ICMP packet decoding and much more. ... * Local TCP, UDP and ICMP statistics instant report.
http://atelierweb.swmirror.com/awsps461.zip - 1Mb - Download - Screenshot

myNetMon
myNetMon, Network Monitor and Packet Analyzing Tool (V. 2. 0) myNetMon is windows based network monitor and packet analyzing (sniffer) tool. myNetMon uses WinPcap, a windows port of Libpcap which is a packet capturing library. Features: * Physicial (Ethernet), * ARP, RARP, IPX, IPV4-6, *... ), port based (TCP: 23, 25, 80 ... ... , packet's length, All these filterings can be created with BPF (Berkeley Packet Filtering) rules, * Changing the content of packets (Packet Forging) and sending to the network, * Reconstruction of TCP packets (So web traffic is saved as Html, Gif, Css, Zip,...
http://www.trsecurity.net/mynetmon/mynetmon.zip - 923Kb - Download - Screenshot