HDD Led Indicator - This is a hard disk activity monitoring tool.
NetSpeedMonitor - NetSpeedMonitor is a lightweight Network Monitoring Toolbar for your Windows Taskbar
Atlas Hard Drive LED - Atlas Hard Drive LED is a system tray utility program that allows the user to always be aware of whether their hard drive is reading or writing. The system tray icon will change to the color red when the selected hard drive is processing.
NetTraffic - Essential network bandwidth monitor.
Tobii Pro Lab - Eye tracking software for behavior research. Combination with other physiological data while you design, execute, and analyze with heat maps, gaze plots.
FreeMeter - Monitor network bandwidth (C#.NET 2k/XP+). Desktop and Systray graph.