NExcel is released under the GNU Lesser General Public License (LGPL).

For details about NExcel's licence see license.txt.(http://nexcel.sourceforge.net/license.txt)

For information about the LGPL license see the GNU site. (http://www.gnu.org/copyleft/lesser.html)

POI is released under the APACHE 

For details about APACHE's license see (http://www.apache.org/licenses/LICENSE-2.0)


APACHE POI SUBCOMPONENTS:

Apache POI includes subcomponents with separate copyright notices and
license terms. Your use of these subcomponents is subject to the terms
and conditions of the following licenses:


Office Open XML schemas (ooxml-schemas-1.0.jar)

    The Office Open XML schema definitions used by Apache POI are
    a part of the Office Open XML ECMA Specification (ECMA-376, [1]).
    As defined in section 9.4 of the ECMA bylaws [2], this specification
    is available to all interested parties without restriction:

        9.4 All documents when approved shall be made available to
            all interested parties without restriction.

    Furthermore, both Microsoft and Adobe have granted patent licenses
    to this work [3,4,5].

    [1] http://www.ecma-international.org/publications/standards/Ecma-376.htm
    [2] http://www.ecma-international.org/memento/Ecmabylaws.htm
    [3] http://www.microsoft.com/interop/osp/
    [4] http://www.ecma-international.org/publications/files/ECMA-ST/Ecma%20PATENT/ECMA-376%20Edition%201%20Microsoft%20Patent%20Declaration.pdf
    [5] http://www.ecma-international.org/publications/files/ECMA-ST/Ecma%20PATENT/ga-2006-191.pdf



