Portable Network Graphics inside Mathematica

PNG Import[] and Export[] support for Mathematica 4.x
The new packages integrate reading and writing of PNG bitmaps into Mathematica's Import[] and Export[] functions. Additional alpha-channel bitmaps and bitmaps with 16 bit bit-depth can be read and written.
 

Installation

The package should be placed in your $TopDirectory/AddOns/Autoload  directory on Windows machines and into $PreferencesDirectory/AddOns/Autoload  (if you don't have it create it). When the Kernel starts it will be able to read and write PNG Bitmaps.
Windows User need MathPNG.zip, UNIX user MathPNG.tar.gz.