libpng
on SourceForge
libpng16/older-releases/1.6.33/lpng1633.zip.asc
libpng16/older-releases/1.6.33/lpng1633.zip
libpng16/older-releases/1.6.33/lpng1633.7z.asc
libpng16/older-releases/1.6.33/lpng1633.7z
libpng16/older-releases/1.6.33/libpng-1.6.33.tar.xz.asc
libpng16/older-releases/1.6.33/libpng-1.6.33.tar.xz