XScreenSaver

The XScreenSaver collection is available below as a DMG containing all 200+ screen savers. MacOS X 10.5 or newer is required.

Source code is also available. To compile the MacOS version, you will need XCode 4.

X11 users:

XScreenSaver is included with almost all Unix systems running the X11 Window System. If you are using Linux or BSD, chances are you have it on your system already. If not, binaries can be found for most systems in RPM and Deb form. I strongly, strongly recommend that you install a binary package rather than compiling it yourself: it's a lot easier that way.

(Note that most distros divide xscreensaver into three or more binary packages. Look for packages whose names begin with "xscreensaver" and end with a random assortment of the words "data", "extra", "extras", and/or "gl".)

I distribute only source code for X11 systems. To compile the latest version of xscreensaver yourself, you'll need a working X11/GNOME development environment. If you have never tried to compile a GNOME program before... stop now. Install a binary release instead. Really.

Windows users:

There is no Windows version of xscreensaver, and there never will be. Please stop asking. Microsoft killed my company, and I hold a personal grudge. I don't use any Microsoft products and neither should you.