Description:

If you want to use the X Window System, you should install X11R6-contrib. This
package holds many useful programs from the X Window System, version 11,
release 6 contrib tape. The programs, contributed by various users, include
listres, xbiff, xedit, xeyes, xcalc, xload and xman, among others.

you will also need to install the X11 package, the X11 package which
corresponds to your video card, one or more of the X11 fonts packages, the
Xconfigurator package and the X11-libs package.

Finally, if you are going to develop applications that run as X clients, you
will also need to install lib64xorg-x11-devel.