The file app/XMLParse.hs is derived from HaXml-1.25.5, which is:
    (c) copyright 1998-1999    Malcolm Wallace and Colin Runciman
    (c) copyright 2000-2013    Malcolm Wallace
and is licenced under the terms of the GNU Lesser General Public Licence (LGPL)
version 2.1 with the following exception (from HaXml's COPYRIGHT file):

----
As a relaxation of clause 6 of the LGPL, the copyright holders of this
library give permission to use, copy, link, modify, and distribute,
binary-only object-code versions of an executable linked with the
original unmodified Library, without requiring the supply of any
mechanism to modify or replace the Library and relink (clauses 6a,
6b, 6c, 6d, 6e), provided that all the other terms of clause 6 are
complied with.
----

All other files are:

  Copyright (C) 2021 Software Freedom Law Center

Licenced under the terms of the GNU General Public Licence (GPL) version 3 or
(ar your option) any later version.