PC Net Checker - Graphic check IP Addresses or TCP Services on LANs or the Internet.
A.I.Studio WatzNew - Keeps track of web site updates, incoming mail and alerts you on changes.
TrafMeter - IP traffic accounting utility, traffic shaper and packet filtering firewall
Alchemy Eye PRO - Server (TCP/IP, ICMP, IPX/SPX, Oracle, MS SQL, NT EventLog) monitoring tool
Domain Name Commando - Monitor domain names, receive automatic email alerts for changes and expirations
FramePad - Network protocol analyzer and monitoring tool for Windows 98/NT/2000/XP.
HiPing - HiPing - multithreaded ping utility.
ipPulse - Monitor network devices and notify of problems via email, pager, web, logs
IPSentry Network Monitoring Suite - Monitor your network and its devices to receive notifications for problems.
MailTalkX - Spam filter software and email monitoring, filter email, auto forward mail.