Package xscreensaver-base

A minimal installation of xscreensaver

http://www.jwz.org/xscreensaver/

A modular screen saver and locker for the X Window System.
This package contains the bare minimum needed to blank and
lock your screen.  The graphical display modes are the
"xscreensaver-extras" and "xscreensaver-gl-extras" packages.
General Commands
Command Description
xscreensaver extensible screen saver and screen locking framework
xscreensaver-command control a running xscreensaver process
xscreensaver-demo interactively control the background xscreensaver daemon