? 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: " '