zlib/libpng License with Acknowledgement
zlib-acknowledgement
None
Copyright (c) 2002-2007 Charlie Poole
Copyright (c) 2002-2004 James W. Newkirk, Michael C. Two, Alexei A. Vorontsov
Copyright (c) 2000-2002 Philip A. Craig
This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software.
Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions:
Portions Copyright (c) 2002-2007 Charlie Poole or Copyright (c) 2002-2004 James W. Newkirk, Michael C. Two, Alexei A. Vorontsov or Copyright (c) 2000-2002 Philip A. Craig
There is no standard license header for the license