The website, libpng.org, is home to the Portable Network Graphics (PNG) image format, the Multiple-image Network Graphics (MNG and JNG) image formats, and the free reference library for reading and writing PNGs called libpng. The website is maintained by Greg Roelofs using servers provided by SourceForge. Different parts of the website are mirrored in various locations worldwide, and there is a separate site for the free MNG library, libmng. The PNG and MNG home pages provide details on the various mirror locations. The website was copyrighted by Greg Roelofs from 2001 to 2006.

libpng.org

don't have tea/gui yet? download here

Copy the tea one-liner above into your terminal to install libpng.org. tea will interpret the documentation and take care of any dependencies.