WMI Explorer - WMI Explorer is a utility intended to provide the ability to browse and view WMI...

NetSpeedMonitor - NetSpeedMonitor is a lightweight Network Monitoring Toolbar for your Windows Taskbar

WMI Tools - WMI Tools is a free toolkit from AdRem Software designed to access WMI information.

NetTraffic - Essential network bandwidth monitor.

CPU-Z - CPU-Z is a freeware that gathers information on some of the main devices of your system : Processor name and number, codename, process, package, cache levels.

FreeMeter - Monitor network bandwidth (C#.NET 2k/XP+). Desktop and Systray graph.