W3C: PNG - W3C overview of PNG. Includes browser tests to see if gamma and alpha work correctly. PNG - Information, applications, and code relating to the PNG image format. PNG Specification - The official W3C recommendation specification for PNG. The Story of PNG - An article detailing the history of the PNG format. PNG Tips for Cartoonists - Article written to encourage cartoonists to use PNG and to share tips on exploiting PNG's strengths. 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. Portable Network Graphics - PNG - Thorough introduction to PNG image format. APNG Specification - An extension of the PNG image format, adding support for animated images. Includes full specification including file structure and version changes. APNG Edit - A firefox extension to allow the creation and editing of APNG files. 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. 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. 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. The Sad Story of PNG Gamma Correction - Explains how PNG gamma "correction" causes color mismatches with other colors on web pages. APNG from GIF - Simple command-line program to convert animated GIFs to APNGs. Open Source Graphics with PNG - Joe Barr discusses PNG, the new open source file format, and the Unisys/CompuServe/GIF controversy. [LinuxWorld]