arb finite volume solver licence details:

Copyright 2009-2018 Dalton Harvie (daltonh@unimelb.edu.au)

This file is part of arb finite volume solver, referred to as `arb'.

arb is a software package designed to solve arbitrary partial
differential equations on unstructured meshes using the finite volume
method.  Primarily it consists of fortran source code, perl source
code and shell scripts.  arb replies on certain third party software
to run, most notably the computer algebra system maxima
<http://maxima.sourceforge.net/> which is released under the GNU GPL.

The original copyright of arb is held by Dalton Harvie, however the
project is now under collaborative development.

arb is released under the GNU GPL.  arb is free software: you can
redistribute it and/or modify it under the terms of the GNU General
Public License (version 3) as published by the Free Software Foundation.
You should have received a copy of the GNU General Public Licence
along with arb (see file licence/gpl.txt after unpacking).  If not,
see <http://www.gnu.org/licences/>.

arb 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 Licence
for more details.

For full details of arb's licence see the licence directory.

The current homepage for the arb finite volume solver project is
<http://people.eng.unimelb.edu.au/daltonh/downloads/arb>.