Web Directory

» APNG Edit
   A firefox extension to allow the creation and editing of APNG files.
   https://addons.mozilla.org/firefox/addon/5519

» APNG Specification
   An extension of the PNG image format, adding support for animated images. Includes full specification including file structure and version changes.
   http://wiki.mozilla.org/APNG_Specification

» MSDN - AlphaImageLoader Filter
   Displays an image within the boundaries of the object and between the object background and content, with options to clip or resize the image. When loading a Portable Network Graphics (PNG) image, transparency from zero to 100 percent is supported.
   http://msdn.microsoft.com/en-us/library/ms532969(VS.85).aspx

» Open Source Graphics with PNG
   Joe Barr discusses PNG, the new open source file format, and the Unisys/CompuServe/GIF controversy. [LinuxWorld]
   http://www.linuxtoday.com/news_story.php3?ltsn=1999-09-09-021-04-PS

» PNG
   Information, applications, and code relating to the PNG image format.
   http://www.libpng.org/pub/png/

» 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.
   http://www.libpng.org/pub/png/pngmisc.html

» 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 foc
   http://optipng.sourceforge.net/pngtech/

» PngCrush
   Includes various free tools to create and manipulate PNG and MNG images, including an optimizer that can reduce the size of PNG images and a converter that can import BMP files.
   http://pmt.sourceforge.net/

» Portable Network Graphics - PNG
   Thorough introduction to PNG image format.
   http://www.mywebsite.force9.co.uk/png/

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

» The Story of PNG
   An article detailing the history of the PNG format.
   http://www.libpng.org/pub/png/slashpng-1999.html

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