WebUdp8 reader bhm brought Fliqlo, a very popular screensaver for Windows and OSX to Linux. Fliqlo allows you to make your screen look like a flip-style clock.

What doesn't work: Noflipqlo currently doesn't work with Gnome Screensaver so you'll have to use Xscreensaver. Also, the "flip" effect doesn't work (hence the name - Noflipqlo).

To install Fliqlo in Linux (called "Noflipqlo"), use the following commands (note: the commands below will disable the Gnome Screensaver):