Extras:libpng

===Credits for libpng===
This code is released under the libpng license.
libpng versions 1.0.7, July 1, 2000, through 1.6.35, July 15, 2018, are Copyright (C) 2000-2002, 2004, 2006-2018 Glenn Randers-Pehrson, and are distributed according to the same disclaimer and license as libpng-1.2.5 with the following individuals added to the list of Contributing Authors:
* Simon-Pierre Cadieux
* Eric S. Raymond
* Måns Rullgård
* Cosmin Truța
* Gilles Vollant
* James Yu
* Mandar Sahastrabuddhe
* Google Inc.
* Vadim Barkov
and with the following additions to the disclaimer:
There is no warranty against interference with your enjoyment of the library or against infringement. There is no warranty that our efforts or the library will fulfill any of your particular purposes or needs. This library is provided with all faults, and the entire risk of satisfactory quality, performance, accuracy, and effort is with the user.
Some files in the "contrib" directory and some configure-generated files that are distributed with libpng have other copyright owners, and are released under other open source licenses.
libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are Copyright (c) 1998, 1999 Glenn Randers-Pehrson, and are distributed according to the same disclaimer as libpng-0.96, with the following individuals added to the list of Contributing Authors:
* Tom Lane
* Glenn Randers-Pehrson
* Willem van Schaik
libpng versions 0.89, June 1996, through 0.96, May 1997, are Copyright (c) 1996, 1997 Andreas Dilger
Distributed according to the same disclaimer and license as libpng-0.88, with the following individuals added to the list of Contributing Authors:
* John Bowler
* Kevin Bracey
* Sam Bushell
* Magnus Holmgren
* Greg Roelofs
* Tom Tanner
libpng versions 0.5, May 1995, through 0.88, January 1996, are Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
For the purposes of this copyright and license, "Contributing Authors" is defined as the following set of individuals:
* Andreas Dilger
* Dave Martindale
* Guy Eric Schalnat
* Paul Schmidt
* Tim Wegner
The PNG Reference Library is supplied "AS IS". The Contributing Authors and Group 42, Inc. disclaims all warranties, expressed or implied, including, without limitation, the warranties of merchantability and of fitness for any purpose. The Contributing Authors and Group 42, Inc. assume no liability for direct, indirect, incidental, special, exemplary, or consequential damages, which may result from the use of the PNG Reference Library, even if advised of the possibility of such damage.
Permission is hereby granted to use, copy, modify, and distribute this source code, or portions hereof, for any purpose, without fee, subject to the following restrictions:
# The origin of this source code must not be misrepresented.
# Altered versions must be plainly marked as such and must not be misrepresented as being the original source.
# This Copyright notice may not be removed or altered from any source or altered source distribution.
The Contributing Authors and Group 42, Inc. specifically permit, without fee, and encourage the use of this source code as a component to supporting the PNG file format in commercial products. If you use this source code in a product, acknowledgment is not required but would be appreciated.
====Contributors====
* Kazuo Adachi - Windows CE port
* Christian Aichinger
* Warwick Allison
* Alam Arias
* Michel Bagmeijer - Current Amiga port
* Brian Baird
* Martin Banky
* Jim Barry
* Nelson H. F. Beebe
* Kai-Uwe Behrmann
* Matthias Benckmann
* Kyle J. Bentley
* Krishnaraj Bhat
* Christian Biesinger
* Claudio Bley
* Emmanuel Blot - Windows port contributor
* Sergey Bolshakov - ALT Sisyphus packaging
* Aaron Boxer
* Carlo Bramini
* Peter Breitenlohner
* Theo Buehler
* Ben Bullock
* Frank Busse
* David Callu
* David Capello
* Brian Carpenter
* Brian Carter
* Cameron Cawley
* JD Chen
* Wilson Chen
* Nirav Chhatrapati
* Jaeseung Choi
* Kurt Christensen
* Hung-Chi Chu - Original OS/2 port
* Kirill Chubanov
* Andrew Church
* Matthias Clasen
* Natanael Copa - Alpine packaging
* Gianfranco Costamagna - Current Debian packaging
* Adam Costello
* John Cromer
* Vladimír Čunát - NixOS packaging
* Robert C. Dailey
* Matthieu Darbois
* Gilles Dauphin
* Bob Dellaca
* John Denker
* L. Peter Deutsch
* Hannes Domani
* Steve Eddins
* Christian Ehrlicher
* Gilles Espinasse
* Alex Eubanks
* Wolf Faust - Original Amiga port
* Michael Felt - AIX packaging
* Christopher Ferris
* Dan Field
* Claudio Fontana
* Nikola Forró - Current Fedora packaging
* Andreas Franek
* Robert J. Friesenhahn
* Tobias Frost - Current Debian packaging
* Tomoyuki Fujimori - Lua bindings
* Jean-loup Gailly
* Petr Gajdos
* Paul Gardner
* Alex Gaynor
* Frank Giessler - Original OS/2 port
* Ralph Giles
* Wolfgang Glas
* Michael Gorchak - QNX Neutrino port
* Dennis Gustafsson
* Simon Hausmann
* Reuben Hawkins
* Chris Herborth
* Christian Hesse
* Shunsaku Hirata
* Matt Holgate
* Mike Hopkirk
* Petr Hráček - Current Fedora packaging
* Andrew Hundt
* Eric Huss
* Nobuhiro Iwamatsu - Current Debian packaging
* Luchang Jin - Haskell wrapper
* Jesse Jones
* Marcin Juszkiewicz
* Jan-Erik Karlsson - Original Amiga port
* Wolfgang S. Kechel
* Patrick Keshishian
* Thomas Klausner - NetBSD packaging
* Mike Klein
* Andreas R. Kleinert - Amiga port contributor
* Myung-Hun Ko - Current OS/2 port
* Marcin Konicki - BeOS port
* Sergey Kosarevsky
* Mateusz Kowalczyk - NixOS packaging
* David P. Kreil
* Bernd Kuhls
* Andreas Kupries
* Nixon Kwok
* Carlo Landmeter - Alpine packaging
* Curtis Leach
* Alexander Lehmann
* Roger Leigh
* Zhijie Liang
* Lorence Lombardo - Current Amiga port
* Philip Lowman
* Roger Lowman
* Andrew I MacIntyre - Original OS/2 port
* Romero Malaquias
* Patrice Mandin - Atari port
* Flavio Medeiros
* Dagobert Michelsen - Solaris packaging
* Zack Middleton
* Aníbal Monsalve Salazar - Original Debian packaging
* David Morrison - Fink packaging
* Josselin Mouette - Original Debian packaging
* Pawel Mrochen
* David Munro
* Pieter Neerincx
* Jan Nijtmans
* Timothy Nikkel
* Daisuke Nishikawa
* Chris Nokleberg
* László Nyul
* Bruce Oberg
* Miguel Ojeda Sandonis
* Nelson A. de Oliveira
* Dimitri Papadopoulos-Orfanos
* Mikuláš Patočka - Current OS/2 port
* Chris Patterson
* Luz Paz - Grammar and spelling fixes
* Jérémie Petit
* Alexey Petruchik
* Brad Pettit
* Vicky Pfau
* Thuan Pham
* Arvan Pritchard
* Maya Rashish
* David Raymond
* Larry Reeves
* John Regehr
* Jim Rice
* Arc Riley
* Steve Robinson
* Cristian Rodríguez
* Bernhard Rosenkränzer
* Guido van Rossum
* Even Rouault
* Kevin Ryde
* Matt Sarrett
* Agostino Sarubbo
* Chris Schleicher
* Ryan Schmidt - macOS port
* Robert Schwebel
* Leon Scroggins III
* Robert C. Seacord
* William L. Sebok - TC3 port contributor
* Yaakov Selkowitz
* Jeremy Sequoia
* Kostya Serebryany
* Sam Serrels
* Siarhei Siamashka
* Carsten Siegner - Current MorphOS port
* Duncan Simpson
* John Smith
* Maxim Sobolev
* Josh Soref
* Max Stepin
* Paul Stewart
* Sander Stok - BeOS port contributor
* Yusaku Sugai
* Jason Summers
* Samuli Suominen
* Viktor Szakáts
* Lénárd Szolnoki
* Rémi Thébault - D bindings
* Christopher Thompson
* Rolf Timmermans
* Vincent Torri
* Richard Townsend
* Michael Trebilcock - Current Amiga port
* Erik W. Troan - Original Fedora packaging
* Philippe Troin - Original Debian packaging
* Bryan Tsai
* Junichi Uekawa - Original Debian packaging
* Ryan VanderMeulen
* Olaf van der Spek
* Harald van Dijk
* James R. Van Zandt
* Rémi Verschelde - Mageia packaging
* Jon Vincent
* Funda Wang
* Samuel Williams
* James Wu
* Qixue Xiao
* Clifford Yapp
* Ted Ying
* Andrew Zabolotny - Original OS/2 port
* Qiang Zhou
* Martin P.J. Zinser
Category:Extras