I made up many more programs for dealing with farbfeld, including PNG conversion without libpng and zlib. These program are all public domain except for LodePNG (which I did not write). Please note it is incomplete and I may add more and/or change later. Please add a link, and if you want you can also make your own copies modified or unmodified. It is: http://zzo38computer.org/prog/farbfeld.zip
