The files in the pcl, pl, psi, pxl, tools and xps directories (folders)
  and any subdirectories (sub-folders) thereof are part of GhostPCL and
  GhostXPS, collectively known as GhostPDL.

  GhostPDL and GPL Ghostscript are free software; you can redistribute 
  and/or modify them under the terms of the GNU Affero General Public
  License as published by the Free Software Foundation, either version
  3 of the License, or (at your option) any later version.

  GhostPDL and GPL Ghostscript are distributed in the hope that they 
  will be useful, but WITHOUT ANY WARRANTY; without even the implied 
  warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the GNU Affero General Public License for more details.

  You should have received a copy of the GNU Affero General Public License
  along with this program so you can know your rights and responsibilities.
  It should be in a file named COPYING. If not, write to the
  Free Software Foundation, Inc., 59 Temple Place Suite 330, Boston, MA
  02111-1307, USA.

 ---

  The set of truetype fonts in the urwfonts directory are necessary for 
  the PCL/XL interpreter to function properly but they ARE NOT FREE 
  SOFTWARE and are NOT distributed under the GNU GPL/AGPL. They can
  instead be redistributed under the AFPL licence which bars commercial
  use.

  If your copy of GhostPDL includes these fonts, you should have
  received a copy of the the Aladdin Free Pubilc License, usually
  in a file called COPYING.AFPL. If not, please contact Artifex
  Software, Inc. 39 Mesa Street, Suite 108A, San Francisco, CA
  94129 USA, or visit http://www.artifex.com/