MegaPing
MegaPing is the ultimate must-have toolkit that provides all essential utilities for Information System specialists, system administrators, IT solution providers or individuals. It includes: Scanners: Comprehensive Security Scanner, Port scanner (TCP and UDP ports), IP scanner, NetBIOS scanner,... Security scanner provides the following information: NetBIOS names, Configuration info, Missing Security Patchs, Installed Service Packs, open TCP and UDP ports, Transports, Shares, Users, Groups, SNMP, Services, Drivers, Local Drives, Sessions, Remote Time of Date, Printers.
http://www.magnetosoft.com/downloads/megaping_setup.exe - 4Mb - Download - Screenshot

NetMessager
NetMessager is Windows application allowing users to send and recieve instant messages over network\Internet. It has set of unique features: - NetMessager supports both UDP (to discover LAN users) and TCP\IP to send messages. - It's quite small (120 Kb executable without optional Updater. ... - It keeps configuration data in their own folder (so it doesn't uses the registry). ... exe. ... So you can transfer it to another PC by simply copying this folder. ... - It restores positions and settings of it's windows on startup.
http://www.x-tensive.com/Data/Downloads/NetMessager/NetMessager.zip - 136Kb - Download - Screenshot

Internet Access Scheduler
Internet Access Scheduler (IAS) is a firewall that offers user-level access controls for Windows 9x/Me. IAS enhances the standard Windows access management and once installed, administrators can assign permissions to TCP/IP connections. Internet Access Scheduler lets you control which users can... You can also set allowed/denied TCP/UDP ports and IP addresses for incoming and outgoing connections. ... Internet Access Scheduler is completely transparent to users and only authorised users are allowed to set rules.
http://www.winutility.com/ias/download/ias.zip - 784Kb - Download - Screenshot

sMonitor
sMonitor is a network monitoring software that allows you to verify the network connectivity of TCP/IP hosts on the Internet and LAN. The program periodically pings, or checks TCP and UDP ports on user specified computers or other network devices. If the destination host fails to reply to a... sMonitor can run as standard Windows application or NT service. ... Based on test results, the program can operate remote systems (power management, reboot, alarm reporting) by modem and telnet using custom scripts.
http://yarovy.com/files/sMonitor.zip - 3Mb - Download - Screenshot

Protoport Personal Firewall
When you're connected to the Internet, you're sending and receiving information in small units called packets. A packet contains the addresses of the sender and the recipient along with a portion of data, a request, a command, or almost anything having to do with your connection to the Internet. ... Native support of all popular protocols (ARP, IP, TCP, UDP, ICMP, etc. ... All network traffic is monitored on the lowest possible level ensuring all unwanted network packets are kept off your computer.
http://www.protoport.com/ftp/firewall.exe - 189Kb - Download - Screenshot

Eserv Mail, News, Web, FTP and Proxy Servers
Eserv/2. 99 is the complete solution to access Internet from LAN: - Mail Server (SMTP, POP3 and IMAP4.
http://www.eserv.ru/eserv/files/Eserv299.exe - 2Mb - Download - Screenshot

Network Configuration Management
Network Configuration Management is a set of utilities that manage network config, diagnose and monitor network, it includes: IP Manager: create different TCP/IP settings profiles, and switch between them instantly without reboot. All you need is just to configure ONCE any of your possible... Socket to Process Mapper: monitors all open TCP and UDP ports in your local computer, and maps ports to owning application so you can find out which program has opened which port. ... Asterisk Password Recovery: recovers forgotten password hidden under asterisk.
http://www.missilesoft.net/downloads/ncm.exe - 4Mb - Download - Screenshot

Remote Performance Observer
Major system capabilities: Remotely collecting data on machines' resources usage (Memory, Processor, Hard Drive, Network Adapter, etc. ), current services and protocols states on the machine (Web Service, Indexing Service, IP, TCP, UDP, ICMP, SMTP, etc. ... Visualizing data in the following ways: at the graph, as statistical report, as indicators (bar, gradient and scale). ... Sending short messages to the users of the stations in a network. ... Performing remote administration tasks: running programs, locking machines, etc.
http://www.apexoft.com/rpo/rpo.zip - 3Mb - Download - Screenshot

Servers Alive
Servers Alive is your 24/7 automatic server monitoring solution for guarding against server and process failures or attack. Script your own tests plus use our built-in functionality to automatically monitor critical server functions and processes including: PING (ICMP/TCP and IPX), TCP Services,... Discover why Servers Alive is the preferred server monitoring solution for compananies and organizations of all sizes. ... Try the free Servers Alive Windows version today. ... You can easily create scripted response scenarioes to reboot,shut down, execute another program, or take any other...
http://www.woodstone.nu/soft/salive.exe - 12Mb - Download - Screenshot

Easy Network Service Monitor
Easy Service Monitor is a network fault management tool that continuously monitors network devices and services. If something went wrong, it will alert you by email/phone/pager BEFORE problems get seriously out of hand. A detailed log file will record every event of the monitored targets and can... You can configure the system so that when something goes wrong, a set of actions, such as execute a program, reboot server or update web page, will be triggered.
http://www.javvin.com/emonitor.exe - 2Mb - Download - Screenshot