Yes, the following is taken from the Credits.txt file:
Thanks to all users for providing such great feedback and helping to keep this program a top quality product.
Special thanks to David Horton and Brendan Wholihan for their continuous testing, feedback, and support.
PDF Functionality is implemented through using the XPDF program. This program is available free of charge and distributed through the GNU license. All appropriate documentation, e.g. license, man pages etc., for XPDF is included in the xpdf sub-folder. An extract from the README appears below:
The Xpdf software and documentation are
copyright 1996-2002 Glyph & Cog, LLC.
Many thanks to Derek B. Noonburg (firstname.lastname@example.org) for providing explicit information on how to include XPDF without violating the GNU license agreement.
Support for the majority of the compressed/composite formats is courtesy of the 7-zip open source libraries. 7-zip is licensed under the GNU LGPL and as such the 7-zip libraries have been compiled and included in the program distribution without any modifications to the 7-zip source code. Source code for the 7-zip libraries can be found here:
An extract from the 7-Zip FAQ (1 Aug 2006) appears below:
Q. Can I use the EXE or DLL files from 7-Zip in a Commercial Application?
A. Yes, but you need to specify in your documentation (1) that you used parts of the 7-Zip program, (2) that 7-Zip is licensed under the GNU LGPL license and (3) link to www.7-zip.org where the source code can be found.
Many thanks to Igor Pavlov for confirming that ALL libraries (except the unRAR library) included in 7-zip and not just the LZMA SDK are licensed under the GNU LGPL.
Registration code management is implemented using the Crypto++ library. From their web site:
"Crypto++ Library is a free C++ class library of cryptographic schemes... Crypto++ Library is copyrighted as a compilation and (as of version 5.6.2) licensed under the Boost Software License 1.0, while the individual files in the compilation are all public domain."
Internal XML support is provided through TinyXML. An extract from the license agreement appears below:
Permission is granted to anyone to use [TinyXML] software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
The internal viewer uses the Scintilla editing component for displaying files. The license agreement is shown below:
License for Scintilla and SciTE
Copyright 1998-2003 by Neil Hodgson <email@example.com>
All Rights Reserved
Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
NEIL HODGSON DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS, IN NO EVENT SHALL NEIL HODGSON BE LIABLE FOR ANY
SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE
OR PERFORMANCE OF THIS SOFTWARE.
The indexing functionality uses the Lucene++ library, which is dual-licensed under LGPL and Apache license. From their web site:
"Lucene++ is an up to date C++ port of the popular Java Lucene library, a high-performance, full-featured text search engine."
The Apache license can be downloaded here:
There are several parts of Boost that are used in the program, which has it's own license:
An excerpt from their license:
"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."