Jamie Zawinski
XScreenSaver for Fedora
FreeSave and lock your screen with eye candy in X Windows.
LinuxXScreenSaver for Fedora (64-bit)
FreeSave and lock your screen with eye candy in X Windows.
Linux
XScreenSaver
FreeLarge collection of classic screensavers.
MacXScreenSaver for Linux
FreeXScreenSaver: Versatile Screensaver for Linux
LinuxDali Clock
FreeDigital clock whose digits change by melting.
Mac