An open-source implementation of the digital document format. Features stand-alone programs and libraries for simple compression, decompression, and viewing. Includes downloads, documentation, and screenshots. [GNU GPL]
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...
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.