PortsLock
PortsLock is a firewall with user-level access controls for Windows NT/2000/XP. Once PortsLock is installed, administrators can assign permissions to TCP/IP connections, just as they would in managing permissions on an NTFS partition of a hard disk. It lets you control which users can access... You can also set allowed/denied TCP/UDP ports and IP addresses for incoming and outgoing connections. ... PortsLock is absolutely transparent to users. ... Users do not have to set up rules in their applications to use the network.
http://www.protect-me.com/portslock.zip - 2Mb - Download - Screenshot

Paessler Netflow Tester
Paessler Netflow Tester dumps the data of all Netflow packets that a computer receives from a Cisco router. This can be useful when debugging bandwidth monitoring configurations based on Cisco's Netflow protocol. First the Netflow protocol must be enabled and configured on the router. ... Then the router must be given the IP address of the computer running Netflow tester so that the UDP data packets with Netflow data are sent to that computer. ... ) 5) Enable "Show Flow Data" to also show the corresponding flow data.
http://download2.paessler.com/download/netflowtester.zip - 381Kb - Download - Screenshot

IT Monitor
IT Monitor is the leading solution for monitoring every aspect of your LAN and WAN network. It proactively manages your network servers, printers, network devices, databases and applications; It detects and corrects problems before network users start complaining. ... It's shipped with an impressive collection of pre-defined, built-in monitoring functions; When problems are detected, you're immediately notified by network message, e-mail, or SMS message. ... The product is extremely scalable.
http://www.cbr.com.tr/cbr/itmonitor/itmonitor.exe - 49Kb - Download - Screenshot

PingCOPA Ping and Traceroute
PingCOPA, is an aid to network engineers when monitoring and diagnosing network problems. PingCOPA installs on all 32 bit Microsoft Windows operating systems (except 95). Speech is only available on systems with the Microsoft Text-to-speech engine installed. ... Traceroute provides both ICMP and UDP hops. ... All addresses are automatically resolved to a URL where possible, and a MAC addresses lookup feature is provided. ... A network calculator provides a means to determine subnet masks and ranges, and various command line tools are provided to monitor your machines network configuration.
http://www.intervations.com/download/pingcopa/_pingcpa.exe - 2Mb - Download - Screenshot

CommTraffic
CommTraffic is a network utility for collecting, processing, and displaying traffic and network utilization statistics for both LAN and dial-up computer network connections. When monitoring a LAN segment, CommTraffic shows traffic and network utilization statistics for each computer in the segment. ... Our unmatched reporting capability allows you to view the traffic statistics by local hosts, remote hosts, IP protocols and remote/local TCP/UDP ports. ... CommTraffic allows you to generate an array of reports that reflect the network traffic volume and Internet connection expenses.
http://www.tamos.com/files/ct3.zip - 4Mb - Download - Screenshot

SocketWrench Standard Edition
The SocketWrench Standard Edition contains an ActiveX control for use in visual development tools such as Visual Basic and FoxPro. It also contains a dynamic link library (DLL) which can be used in a wide variety of programming languages, both those supported in Visual Studio as well as... Standard client and server capability is provided, as well as support for both TCP and UDP protocols and the complete Windows Sockets API. ... Virtually any type of application which needs to communicate with another, either on a local network or over the Internet, can be written using the SocketWrench...
ftp://ftp1.catalyst.com/pub/cstools/sw45st32.zip - 4Mb - Download - Screenshot

Network Commander
This application was written due to a lot of frustration from my side, I have been working a lot with network configurations, routers setup (networking maintenance, in general). I didn? t have any good tool that will help me with the little things. I hate going to command prompt and run programs... Couple of more convenient features where implemented to make your life much more easier: port scanner, that can scan a range of IP address for open/closed ports, network utilization that can enumerate the current network usage, TCP/UDP/ICMP/IP statistics for the current machine and more..
http://geocities.com/ncfreeware/NC201Setup.zip - 9Mb - Download - Screenshot

GFI Network Server Monitor
GFI Network Server Monitor automatically monitors the network & servers for failures. It allows you to identify issues and fix unexpected conditions before your users (or managers) report them to you! Alerts can be sent by email, pager or SMS, for instant problem notification. ... Built-in monitoring rules include: Exchange Server 2000/2003, MS SQL, Oracle and ODBC databases, CPU usage, FTP & HTTP Servers Group Membership, Active Directory & NTDS, Disk Drive health, Disk Space, Event Log (with content checking), File Existence (with content checking), TCP, UDP, ICMP/Ping, SMTP & POP3 Mail...
http://software.gfi.com/networkservermonitor7.exe - 13Mb - Download - Screenshot

LogAnalytics
LogAnalytics automatically accumulates the necessary data simultaneously from several polytypic log sources, realizes user-defined statistical treatment and presents results in a set of easy-to-understand rotatable 3D graphs through a convenient WEB-based interface. ... Features: Automated and simultaneous source data gathering and statistical treatment ; Various incoming data source: Any text file (for a software analyzing); Serial communication port (for PBX etc); TCP connection, including internet connection (for appliances); UDP listener (Sys Log); ODBC compatible source (for...
http://sphinx-soft.com/download/LApremium-Setup.exe - 3Mb - Download - Screenshot

karalon PC Status Screen Saver
The karalon screen saver provides users with a real-time graphical display showing what their PC is doing during idle time including system activity and availability, active processes and performance information. Real-time displays show the following information, packet decode graph together... Display duration, options selected, colour settings, cities and background image can be customized to a users preference. ... The background is a choice of two real-time revolving pictures of Earth from space displaying major cities and local times.
http://www.karalon.com/Downloads.htm - 3Mb - Download - Screenshot