Patrick Naughton's xlock and 90+ more modes. New options -inwindow, -inroot, -geometry, -icongeometry, -install, -lockdelay; which allows you to run it in a window,in the root window, in a different size/location, change the size of the iconified window, to install a new colormap, and delay locking for use with xautolock. Options can now be passed to modes. Also improvements in portability. It also has compile time switches for use in a public lab and personal use. Supports MesaGL/OpenGL and XPM modes, (highly desirable)but not required.