Countdown Screensaver - A Mac screensaver for counting down to a date ๐ฅ๐
Padbury Clock Screensaver - Minimal screensaver for Mac
Timetaco - Create your own countdowns, as easy as 3, 2, 1
XScreenSaver - XScreenSaver is the standard screen saver collection shipped on most Linux and Unix systems running...
It's Almost - Your simple countdown to anything.
Really Slick Screensavers - Really Slick contains free 3D OpenGL screensavers.