A tiny binary clock display integrated into Windows XP taskbar, replacing the standard clock in the taskbar notification area. Two display modes (six decimal digits and true binary) and customization of the color and shape of LEDs are available.
That clock works under Win7. Unfortunately it seems to display the wrong time. (It uses 7 bits for seconds, 7 bits for minutes and 6 bits for hours. That makes 64 hours per day + 128 minutes per hour + 128 seconds per minute.) Anyway under Win7 it cannot display the options window.