Additional rights granted beyond the GPL (the "Exception").
As a special exception to the terms and conditions of GPL version 2.0 or GPL version 3.0, you are hereby grants you the rights described below, provided you agree to the terms and conditions in this Exception, including its obligations and restrictions on use.
Nothing in this Exception gives you or anyone else the right to change the licensing terms of the Cauchy Mathematic Compiler.
Below, "Licensed Software" shall refer to the software licensed under the GPL version 2.0 or GPL version 3.0 and this exception.
1) The right to use open source licenses not compatible with the GNU General Public License version 2.0 or GNU General Public License version 3.0: You may link software (hereafter referred to as "Your Software") against the Licensed Software and/or distribute binaries of Your Software linked against the Licensed Software, provided that:
A) Your Software is licensed under one of the following licenses:
  License name                                                Version(s)/Copyright Date
  Academic Free License                                       2.0, 2.1, 3.0
  Apache Software License                                     1.0 or 1.1
  Apache License                                              2.0
  Apple Public Source License                                 2.0
  Artistic license                                            (as set forth in the addendum file)
  BSD license                                                 "July 22 1999"
  Common Development and Distribution License (CDDL)          1.0
  Common Public License                                       1.0
  Eclipse Public License                                      1.0
  GNU Library or "Lesser" General Public License (LGPL)       2.0, 2.1, 3.0
  Jabber Open Source License                                  1.0
  MIT License                                                 (as set forth in the addendum file)
  Mozilla Public License (MPL)                                1.0 or 1.1
  Open Software License                                       2.0, 3.0
  OpenSSL license (with original SSLeay license)              "2003" ("1998")
  PHP License                                                 3.0
  Python license (CNRI Python License)                        (as set forth in the addendum file)
  Python Software Foundation License                          2.1.1
  Q Public License                                            1.0
  Sleepycat License                                           "1999"
  W3C License                                                 "2001"
  X11 License                                                 X11R6.6
  Zlib/libpng License                                         (as set forth in the addendum file)
  Zope Public License                                         2.0, 2.1
  (Licenses without a specific version number or date are reproduced in the file COPYING.RUNTIME.EXCEPTION.ADDENDUM in your source package).
and
B) You must, on request, make a complete package including the complete source code of Your Software (as defined in the GNU General Public License version 2, section 3, but excluding anything excluded by the special exception in the same section) available to Cyrille Berger under the same license as that granted to other recipients of the source code of Your Software.
and
C) Your or any other contributor's rights to:
i) distribute the source code of Your Software to anyone for any purpose;
and
ii) publicly discuss the development project for Your Software and its goals in any form and in any forum are not prohibited by any legal instrument, including but not limited to contracts, non-disclosure agreements, and employee contracts.

In case this license agreemnt does not cover your need (in particular for a full commercial use), you are advised to contact Cyrille Berger <cberger@cberger.net> to find a solution that suits your need.