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
Received on Wed Apr 20 2016 - 10:56:36 CEST