BEM++ consists of a main library (situated under lib and under python), 
and several support libraries with various licenses. 
The following gives a summary of the licenses of BEM++ and the various components

BEM++ main library: MIT License
Boost: Boost Software License
Dune: GPL v2 with runtime exception
Intel Threading Building Blocks: GPL v2 with runtime exception
Eigen3: MPL2

In the following we summarize the license text of the various components.
===========================================

The main library (situated under lib and python) is licensed under the MIT license.
Most of the files have the following license text:

Copyright (C) 2011 by the BEM++ Authors

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
------------------------------------------------------------------
The files under lib/fiber/quadrature are part of the HyENA project
(http://portal.tugraz.at/portal/page/portal/Files/i2610/files/Forschung/Software/HyENA/html/index.html)
and have been relicensed under an MIT license with permission by the authors.


================================

Boost (www.boost.org)

Boost Software License - Version 1.0 - August 17th, 2003

Permission is hereby granted, free of charge, to any person or organization
obtaining a copy of the software and accompanying documentation covered by
this license (the "Software") to use, reproduce, display, distribute,
execute, and transmit the Software, and to prepare derivative works of the
Software, and to permit third-parties to whom the Software is furnished to
do so, all subject to the following:

The copyright notices in the Software and this entire statement, including
the above license grant, this restriction and the following disclaimer,
must be included in all copies of the Software, in whole or in part, and
all derivative works of the Software, unless such copies or derivative
works are solely in the form of machine-executable object code generated by
a source language processor.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.


================================


Dune (www.dune-project.org)

The DUNE library and headers are licensed under version 2 of the GNU General
Public License, with a special exception for linking and compiling against DUNE,
the so-called "runtime exception." The license is intended to be similiar to the
GNU Lesser General Public License, which by itself isn't suitable for a template
library.

The exact wording of the exception reads as follows:

   As a special exception, you may use the DUNE library without
   restriction.  Specifically, if other files instantiate templates or
   use macros or inline functions from one or more of the DUNE source
   files, or you compile one or more of the DUNE source files and link
   them with other files to produce an executable, this does not by
   itself cause the resulting executable to be covered by the GNU
   General Public License.  This exception does not however invalidate
   any other reasons why the executable file might be covered by the
   GNU General Public License.

This license clones the one of the libstc++ library. For further implications
please see the license page of libstdc++.

================================

Intel Threading Building Blocks (threadingbuildingblocks.org)

The open-source version of Intel TBB is licensed under GPL v2 with a runtime
exception. Details can be found at

http://threadingbuildingblocks.org/wiki/index.php?title=Licensing

================================

Eigen3 (eigen.tuxfamily.org)

See https://www.mozilla.org/MPL/2.0/ for the full text of the MPL2 license