Xscreensaver has been around since forever, or more precisely 1992, which in Linux-years is forever. Xscreensaver runs on any Linux, Unix, OS X, and iOS. Xscreensaver supports 200+ screensavers thanks to its modular structure, which allows contributors to plug in new screensavers seamlessly. My favorites are Atlantis, Matrix, Bouncing Cow (that one entertains my dog for hours) and Star Wars (figure 1). The Star Wars screensaver displays a text crawl like the beginning of the Star Wars movie.