I know there are still many flat-file CMS platforms out there, some even geared for blogging. But I think pretty much all modern ones use PHP, Javascript, etc. etc. How many are really really simple? Nanoblogger is mainly bash scripts. Similarly there were programs like Blosxom which was just one big Perl script. And of course, Graymatter comes to mind as the granddaddy of them all.
What other dead-simple blogging platforms still exist?