I'm not sure how to describe this best, but is a Python script to turn a list of numbers into a (plain format) PPM image filled with coloured boxes. Perhaps an example is best.

$ cat

$ ./ -W 40 -H 40 -c 10 ./ > test.ppm

$ convert test.ppm test.png

You should end up with

numbers2ppm script output

If you're me, you could use something like this to read a dump of reference counts of physical frames of memory dumped from the kernel, creating a nice graphical view of memory usage and sharing. I imagine it may come in handy for other things too.