xtrlock (minimal X display lock)
xtrlock is a very minimal X display lock program, which uses nothing
except the Xlib library. It doesn't obscure the screen, it is completely
idle while the display is locked and you don't type at it, and it doesn't
do funny things to the X access control lists.
Maintained by: B. Watson
Keywords: lock,screen lock,xscreensaver,xlock,xflock4
(the SlackBuild does not include the source)