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.
XScreenSaverWin is a Windows port of XScreenSaver. 204 screensavers in XScreenSaver were ported. A few of the screensavers have some issues. Check the status page for more. (This app is no longer free or open source starting with v0.80.
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