KCometen4 is an OpenGL screensaver for KDE 4.
A screensaver for your KDE desktop
A simple screensaver for Linux and UNIX
KDE4 Ocean screensaver
QCometen3 is a port of the popular KCometen3 screensaver for KDE, to Qt4.
Ocean is a screensaver for KDE.
KFlocks project is an openGL screen saver for KDE.
screensaverpauser is an Amarok script that pauses Amarok on activating the KDE screensaver.