Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Source: Gathered from many sources, including old usenet posts in the 90's.

Files: *
Copyright: 1996-2009 Joey Hess <id@joeyh.name>
License: GPL-2+
 The full text of the GPL is distributed as GPL in filters's source,
 and is distributed in /usr/share/common-licenses/GPL-2 on Debian systems.

Files: jethro.l
Copyright: 1993 Duane Paulson <ci922@cleveland.freenet.edu>
License: other-1
  **   Public domain. Use at your own risk. Y'all come back now, heah?

Files: kraut.l
Copyright: 1989 John Sparks
License: other-2
  /* This is in the public domain. Do with it as you will. *\

Files: cockney.l jive.l nyc.l
Copyright: 1986 Daniel V Klein <dvk@lonewolf.com>
License: GPL
 Daniel confirmed the copyright in this email:
 .
  From: Daniel V Klein <dvk@lonewolf.com>
  Date: Wed, 22 Nov 2000 22:00:50 -0500
  To: Joey Hess <joey@kitenet.net>
  Subject: Re: filters GPL'd
 .
  That is so.  Have fun (FWIW, I have done some rewriting on them - they are
  now in Perl, but still need some work...)
 .
  -Dan
 .
  > I've been told that you have changed the copyright of the cockney, jive
  > and nyc filters to the GPL? Is that correct? I'd love to move them into
  > Debian proper.

Files: rasterman
Copyright: 1997 Zachary Beane
License: GPL-2

Files: ken.l
Copyright: Stephen K Mulrine <smulrine%cs.strath.ac.uk@nsfnet-relay.ac.uk>
License: other-3
 The ken filter is now in the public domain. Its author confirmed the
 new license in this email:
 .
  From: Stephen Mulrine <stephen@moroder.scotnet.co.uk>
  Date: Mon, 11 Jun 2001 01:06:52 +0100 (BST)
  To: edward@debian.org (Edward Betts)
  Subject: Re: Ken?
 .
  [...]
 .
  >We would like to include ken in the Debian GNU/Linux Operating System, but
  >we need permission to modify ken if we want to. Would you be willing to
  >relicense ken under the GNU GPL, a BSD like license, or public domain?
 .
  Certainly, it would be an honour to have it included in the Debian
  distribution so I hereby release ken into the public domain.

Files: ky00te.dir/*
Copyright: 1994 Brent E. Edwards
License: GPL-2
Comment:
 The ky00te filter is now relicensed under the GPL. Its author
 confirmed the new license in this email:
 .
  From: Brent Edwards <chipuni@hypersurf.com>
  Date: Sat, 30 Jun 2001 09:37:53 -0700
  To: Edward Betts <edward@debian.org>
  Subject: Re: Is this the author of the ky00te filter?
 .
  Dear Edward,
          You have my permission to put the ky00te filter into the GNU GPL
  license.  (Though the license will be far longer than the program itself!)
 .
                          -- Brent Edwards

Files: newspeak.l
Copyright: 1991 Jamie Zawinski <jwz@jwz.org>
License: other-4
 The newspeak filter is now relicensed under a BSD-like copyright. Its
 author established the new copyright in this email:
 .
  From: Jamie Zawinski <jwz@jwz.org>
  Date: Mon, 06 Aug 2001 16:17:02 -0700
  To: Joey Hess <joeyh@debian.org>
  Subject: Re: copyright of newspeak filter
 .
  Hey there -- I'm cleaning out old mail, and don't remember if I replied
  to this or not.  Anyway, in case I didn't -- feel free to slap this
  license atop the newspeak script (it's BSD-like, so that should work
  for you.)
 .
        Copyright (c) 1991 Jamie Zawinski <jwz@jwz.org>
 .
        Permission to use, copy, modify, distribute, and sell this
        software and its documentation for any purpose is hereby granted
        without fee, provided that the above copyright notice appear in
        all copies and that both that copyright notice and this
        permission notice appear in supporting documentation.  No
        representations are made about the suitability of this software
        for any purpose.  It is provided "as is" without express or
        implied warranty.

Files: studly
Copyright: Nick Phillips <nwp@lemon-computing.com>
License: other-5
 # just for reference, you may do whatever you like with this file.

Files: nethackify.c
Copyright: 2004 G�kan Seng� <gurkan@linuks.mine.nu>
License: GPL-2

Files: pirate
Copyright: 2003 Dougal Campbell
License: GPL-2
Comment: Converted from a php version in the funfilters.

Files: kenny
Copyright:
  2001 Christian Garbs <mitch@cgarbs.de>
  2002 Alan Eldridge <alane@geeksrus.net>
License: Artistic
 On Debian systems, the full text of the Artistic license can be found in
 /usr/share/common-licenses/Artistic

Files: scottish
Copyright: 2007 Adam Borowski <kilobyte@angband.pl>
License: GPL-3+
 The full text of the GPL version 3 can be found in
 /usr/share/common-licenses/GPL-3 on Debian systems.

License: GPL-2
 The full text of the GPL is distributed as GPL in filters's source,
 and is distributed in /usr/share/common-licenses/GPL-2 on Debian systems.
