TkCVS was originally written by Del <del@babel.com.au> and released as
public domain.

In 1998 Dorothy Robinson took over maintainership.
TKCVS was re-licensed under the GPL v2 (or later)

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License along
    with this program; if not, see <https://www.gnu.org/licenses/>.

TkCVS was renamed to TKRev in 2020 (version 9.4).

List of copyright holders for tkrev (excluding contrib and tkdiff
subdirectories)
Copyright (C) 1992-1998 Del del@babel.com.au 
Copyright (C) 1998-2025 Dorothy Robinson
Copyright (C) 1999 Christoph Jaeschke
Copyright (C) 1999 Jo Wahle
Copyright (C) 1999-2000 Marcel Koelewijn
Copyright (C) 2002 Mike Jagdis
Copyright (C) 2025 by Michael-M ("vampm")

The tkdiff subdirectory contains a copy of tkdiff
https://sourceforge.net/p/tkdiff - See its README.txt for copyright/license
information.

Other contributors:

Release 4
  Carl Staelin staelin@info.hpl.hp.com
  Uwe Graichen graichen@bln.sel.alcatel.de
  Matthias Schade mascha@mt.e-technik.uni-kassel.de
  Steven Jowers jowers@pat.mdc.com
Release 5
  Jeremy Harker harkerj@ttc.com
  Eugene Lee, Aerospace Corporation. gene@mars.aero.org
Release 6.1
  M.E. Smith
  Christoph Jaeschke
  Jo Wahle
  Stephen Kick
Release 6.3 (2000)
  Andrew Johnson
  Marcel Koelewijn
Release 7.1
  2002 Mike Jagdis
  2002 Laurent Duperval
  2002 John Lash
  2002 John Cerney
Release 8.2 (2011)
  2010 Steve Schwarm
Release 9.6
  2025 Michael Moran vampm@comcast.net
