FreeMeter - Monitor network bandwidth (C#.NET 2k/XP+). Desktop and Systray graph.
SolarWinds Service Desk - An IT service management (ITSM) solution that understands what it takes to successfully manage your employee services. Try Solarwinds Service Desk for free!
TrafficMonitor - TrafficMonitor is a network monitoring suspension window software in Windows.
Lansweeper - Lansweeper discovers Windows, Linux and Mac machines in your network.
NetSpeedMonitor - NetSpeedMonitor is a lightweight Network Monitoring Toolbar for your Windows Taskbar
LogMeIn Central - LogMeIn Central is a comprehensive endpoint management software that easily helps IT professionals manage and monitor their organization’s endpoint infrastructure.