1)   Performance Monitor 3.8.5
Monitor your CPU, Memory, Disk and Network utilization with this very useful program

 2)   DEKSI Network Monitor 5.3
DEKSI Network Monitor is an advanced, powerful, and feature rich tool that monitors servers located on your LAN, WAN, and the Internet. Windows 9X, NT, 2000, XP, 2003 Server, Vista compatible and can monitor the servers with any operating system.

 3)   DEKSI Network Analyzer 6.0
An advanced, powerful, and feature rich network mapping, monitoring, management, and administration software solution.

 4)   DEKSI LAN Manager 1.82
DEKSI LAN Manager is an advanced, powerful, and feature rich program designed for high speed network management. DEKSI LAN Manager provides network management, discovery and monitoring software for networks.

 5)   AdventNet ManageEngine OpUtils 4
The AdventNet ManageEngine OpUtils is a comprehensive set of 45+ unique system and network monitoring tools. This web-based software helps IT administrators monitor, diagnose and troubleshoot their IT resources. OpUtils is web-based and very quick.

 6)   DEKSI Network Manager 4.9
DEKSI Network Manager is an advanced and powerful network monitoring tool. It can continuously monitor the state of your servers, various network services, databases and more over the network seven days a a week, twenty-four hours a day.

 7)   Network Traffic Monitor (NetTraffic) 1.8
NetTraffic v1.8 - This free program plots in realtime all data sent and received via all your TCP/IP Network adaptors. Shows separate sent, received, send rate, received rate, peaks and totals. Five graphs and statistics. Animated System Tray Icon.