HIDAPI can be used under one of three licenses.

1. The GNU Public License, version 3.0, in LICENSE-gpl3.txt
2. A BSD-Style License, in LICENSE-bsd.txt.
3. The more liberal original HIDAPI license. LICENSE-orig.txt

The license chosen is at the discretion of the user of HIDAPI. For example:
1. An author of GPL software would likely use HIDAPI under the terms of the
GPL.

2. An author of commercial closed-source software would likely use HIDAPI
under the terms of the BSD-style license or the original HIDAPI license.

Copyright (c) 2010, Alan Ott, Signal 11 Software
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

   * Redistributions of source code must retain the above copyright notice,
     this list of conditions and the following disclaimer.
   * Redistributions in binary form must reproduce the above copyright
     notice, this list of conditions and the following disclaimer in the
     documentation and/or other materials provided with the distribution.
   * Neither the name of Signal 11 Software nor the names of its
     contributors may be used to endorse or promote products derived from
     this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.

On Debian systems, the complete text of the GNU General
Public License can be found in `/usr/share/common-licenses/GPL-3'. 

 In the preparation of the 0.8.90 release Novell took care of tracking
 down all the contributors to get them to relicense their artwork
 into Public Domain.

 The COPYING file of the tarball states the following:
 | The icons in this repository are herefore released into the Public Domain.

 Additionally the copyright status of the files was tracked in the CVS and the
 rdf properties of the SVGs adjusted for all files that were put into Public
 Domain (see rdf:about and rdf:resource).  Both fields contain a link to the
 Creative Commons Public Domain Dediciation[0] as reproduced below:
 | Public Domain Dedication
 |
 | Copyright-Only Dedication (based on United States law) or Public Domain
 | Certification
 |
 | The person or persons who have associated work with this document (the
 | "Dedicator" or "Certifier") hereby either (a) certifies that, to the best
 | of his knowledge, the work of authorship identified is in the public
 | domain of the country from which the work is published, or (b)
 | hereby dedicates whatever copyright the dedicators holds in the work
 | of authorship identified below (the "Work") to the public domain. A
 | certifier, moreover, dedicates any copyright interest he may have in
 | the associated work, and for these purposes, is described as a
 | "dedicator" below.
 |
 | A certifier has taken reasonable steps to verify the copyright
 | status of this work. Certifier recognizes that his good faith efforts
 | may not shield him from liability if in fact the work certified is not
 | in the public domain.
 |
 | Dedicator makes this dedication for the benefit of the public at
 | large and to the detriment of the Dedicator's heirs and successors.
 | Dedicator intends this dedication to be an overt act of relinquishment
 | in perpetuity of all present and future rights under copyright law,
 | whether vested or contingent, in the Work. Dedicator understands that
 | such relinquishment of all rights includes the relinquishment of all
 | rights to enforce (by lawsuit or otherwise) those copyrights in the
 | Work.
 |
 | Dedicator recognizes that, once placed in the public domain, the Work
 | may be freely reproduced, distributed, transmitted, used, modified,
 | built upon, or otherwise exploited by anyone for any purpose, commercial
 | or non-commercial, and in any way, including by methods that have not
 | yet been invented or conceived.
 [0] http://creativecommons.org/licenses/publicdomain/ 

 + + +   This Software is released under the "Simplified BSD License"  + + +
Copyright 2010 Moe Wheatley. All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are
permitted provided that the following conditions are met:

   1. Redistributions of source code must retain the above copyright notice, this list of
     conditions and the following disclaimer.

   2. Redistributions in binary form must reproduce the above copyright notice, this list
     of conditions and the following disclaimer in the documentation and/or other materials
       provided with the distribution.

THIS SOFTWARE IS PROVIDED BY Moe Wheatley ``AS IS'' AND ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL Moe Wheatley OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

The views and conclusions contained in the software and documentation are those of the
authors and should not be interpreted as representing official policies, either expressed
or implied, of Moe Wheatley. 

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program 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 License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http:www.gnu.org/licenses/>.

On Debian systems, the complete text of the GNU General
Public License can be found in `/usr/share/common-licenses/GPL-3'. 

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program 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 License for more details.

On Debian systems, the complete text of the GNU General
Public License can be found in `/usr/share/common-licenses/GPL-2'.