XnView - a Windows/MacOS image viewer supporting PPM format.
netherlands-alex.ppm | output of netherlands.c | program
italy-alex.ppm | output of italy.c | program
switzerland-alex.ppm | output of switzerland.c | program
finland-alex.ppm | output of finland.c | program
laos-alex.ppm | output of laos.c | program
greenland-alex.ppm | output of greenland.c | program
czech-alex.ppm | output of czech.c | program
scotland-alex.ppm | output of scotland.c | program