Papua-New-Guinea.com

The Sad Story of PNG Gamma Correction
Explains how PNG gamma "correction" causes color mismatches with other colors on web pages.
hsivonen.iki.fi/

W3C: PNG
W3C overview of PNG. Includes browser tests to see if gamma and alpha work correctly.
www.w3.org/

PNG Resources of the Miscellaneous Persuasion
Links to images, mailing lists, test images, PNG and image compression documents, comics and websites using PNGs, the official site, and some unofficial resource sites.
www.libpng.org/

PNG Tips for Cartoonists
Article written to encourage cartoonists to use PNG and to share tips on exploiting PNG's strengths.
hackles.org/

Portable Network Graphics - PNG
Thorough introduction to PNG image format.
www.webcolors.freeserve.co.uk/

PNG-Tech
A collection of comments, impressions, comparisons, experiments and ideas regarding the PNG (Portable Network Graphics) file format, and related technologies: ZLIB (Data Compression Format and Library), and MNG (Multiple-Image Network Graphics). It is focused on the compression algorithms used in PNG.
www.cs.toronto.edu/

Explorer versus PNG (AlphaImageLoader)
Information on displaying transparent and translucent (alpha channel) PNGs in Internet Explorer and other browsers.
redvip.homelinux.net/

The Story of PNG
An article detailing the history of the PNG format.
www.libpng.org/

Open Source Graphics with PNG
Joe Barr discusses PNG, the new open source file format, and the Unisys/CompuServe/GIF controversy. [LinuxWorld]
www.linuxworld.com/

PNG
Information, applications, and code relating to the PNG image format.
www.libpng.org/