After The End / Theatre

  • The misanthropic recluse, Hamm, his servant Clov, and Hamm's parents Nagg and Nell appear to be among the last survivors of humanity in Samuel Beckett's Endgame.
  • Mr Burns: A Post-Electric Play, by Anne Washburn, takes place after a catastrophic event that seems to combine post-nuke and Post-Peak Oil. In the first act it's established that humans are keeping alive distorted memories of their old culture - notably The Simpsons - through oral tradition. The second act takes place decades later after another apocalypse.
http://tvtropes.org/pmwiki/pmwiki.php/AfterTheEnd/Theatre