Xscreensaver for Windows!

A screensaver that displays the time using a flip clock.

XScreenSaver is the standard screen saver collection shipped on most Linux and Unix systems running the X11 Window System. The first version was released in 1992. In 2006, it was ported to macOS 10.4.

Movable brick block screensaver resembling Tetris with Legos.

gnome-screensaver is a new screensaver that can replace xscreensaver. It is designed to integrate well with the desktop and provide a control interface that is desktop neutral. It simplifies and streamlines the experience for the user and provides more capability for the system administrator and vendor.