? libpng, Graphics, Portable Network Graphics libraru for OpenVMS   = From Wikipedia: libpng is the official PNG reference library  9 (originally called pnglib). It is a platform independent  ; library that contains C functions for handling PNG images.  6 It is developed by Guy Eric Schalnat, Andreas Dilger, " Glenn Randers-Pehrson and others.    libpng is dependent on zlib.   For information:  "   <http://libpng.sourceforge.net/>'   <http://en.wikipedia.org/wiki/Libpng>   