Scott's Nixie Tube Clock is a free desktop clock for Windows. This clock has two different styles: Nixie and VFD. The clock interface style can be easily switched from one mode to the other. Both styles are available in large and small versions. It is possible to customize several options to our preferences, for example, select the clock to stay on top of any other application, choose the displaying mode of the current time (12-hour and 24-hour formats), select the colors of the digits (cyan, read, or blue), although this last option is only available for the VFD style. The clock displays the hour, minutes, and seconds. We are allowed to drag and drop the clock to any position in our desktop. By right clicking on the clock interface, we can access the options menu, open the online user's manual, view the program information, and quit. This program is delivered on a freeware basis for non-commercial use. The program size is quite small, so that those users with low Internet connections can download it. This utility runs under the following operating systems: Windows XP, 2000, NT, ME, 98, and 95.