This is Debian GNU/Linux's prepackaged version of aspline.

It was downloaded from:
    http://homepage.hispeed.ch/david.frey/

aspline is Copyright (C) 1996-2010 David Frey <dfrey@debian.org>

   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; version 2 dated June, 1991.

   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, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

Debian packaging is
  Copyright (c) 1996-2009 David Frey <dfrey@debian.org>
                2009-2010 Stuart Prescott <stuart+debian@nanonanonano.net>

On Debian GNU/Linux systems, the complete text of the GNU General
Public License can be found in `/usr/share/common-licenses/GPL-2'.