Topmost Clock is a transparent desktop clock, which runs on top of all other windows. It may have a digital or analog clock face of various colors, sizes and shapes. It has flexible settings, which allow customizing the clock so that it could be easily seen in any environment, but wouldn't irritate you or overlap with important interface elements.

• 12Ghosts ShowTime 8.11
  Enhance your taskbar clock to show the date and a second time zone. You may display seconds smaller and the date in a different color, for example. Everything is configurable, the...

• TimeZone Expert world time zone clock 2005
  -Show multiple time zone clocks in Windows taskbar

• 7art Cheerful Clock ScreenSaver 1.2
  Get 14 cheerful Clock in one single clock screensaver: Mechanical Clock, Neon Clock, Orange Clock, Picasso Clock, Pifagor Clock, Pizza Clock, Radioactive Clock, 4-Seasons Clock, Surprise Clock and more