ftp.nice.ch/Attic/openStep/unix/graphics/conversion/GraphicsFrameworks.m.NIS.b.tgz#/Frameworks/Png.framework/Versions/0_96/Headers

png.h
[View png.h] 

pngconf.h
[View pngconf.h] 

These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.