Here is another desktop clock that I have added to my collection, called TheAeroClock, that features alpha-transparency.
Alpha compositing (Alpha-Transparency) is the process of combining an image with a background to create the appearance of partial transparency. In computer graphics, we have given the formulas above for the color channels in a composite of two partially transparent images.
TheAeroClock is a desktop clock that is fully customizable. For example, you can change the total transparency, size, setting, and the selection of the clock’s appearance. I particularly like the glass texture. Oh, I forgot to mention, it is a portable app, as well.