--- /dev/null
+This directory (contrib/tools) contains tools used by the authors of libpng.
+
+Code and data placed in this directory is not required to build libpng,
+however the code in this directory has been used to generate data or code in
+the body of the libpng source. The source code identifies where this has
+been done. Code in this directory may not compile on all operating systems
+that libpng supports.
+
+NO COPYRIGHT RIGHTS ARE CLAIMED TO ANY OF THE FILES IN THIS DIRECTORY.
+
+To the extent possible under law, the authors have waived all copyright and
+related or neighboring rights to this work. This work is published from:
+United States.
+
+The files may be used freely in any way.
+
+The source code and comments in this directory are the original work of the
+people named below. No other person or organization has made contributions to
+the work in this directory.
+
+ORIGINAL AUTHORS
+ The following people have contributed to the code in this directory. None
+ of the people below claim any rights with regard to the contents of this
+ directory.
+
+ John Bowler <jbowler@acm.org>