LANView 

LANView is a powerful tool for LAN administration. It can rapidly gather the hosts' information in the network, With LANView, capturing and analyzing network packets real time would be convenient.
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NetStatus 

NetStatus is a monitoring application designed to monitor anywhere from 1 to 50 servers or devices on a network. Tests include HTTP, FTP, Telnet, Ping, Disk Space, NT Service Status, POP3, SMTP and more.
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NetStatus Professional 

NetStatus Pro is a monitoring application designed to monitor anywhere from 1 to 250 servers or devices on a network. Tests include HTTP, FTP, Telnet, Ping, Disk Space, Event Log, File Exists, NT Service Status, Performance Monitor and more.
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Easy Network Service Monitor 

Easy to use and low cost tool for network, applications and services monitoring, fault identification, notification and reporting as well as service level agreement monitoring and reporting.
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Professional Edition 

A collection of over 30 Network Discovery, Monitoring and Management tools. Includes NETWORK MONITOR with email alerting, BANDWIDTH MONITOR, MIB WALK, IP NETWOR BROWSER, MAC ADDRESS DISCOVERY & many more. Pound for Pound, the best toolset available.
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Net Events 

Workstations monitoring with customizable reactions to certain events. There is periodical event checking with reacting to event occurence. Each workstation can have unlimited events and each event can have unlimited reactions.
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