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  • idlethreat
    +3

    Whitespace, Brainfuck and Chef are three that I'm aware of. I think Chef is clever.

    • redalastor
      +4

      Piet is the one I think is clever.

    • mlrutherford
      +2

      I thought whitespace was clever. I've heard people talking about people embedding Whitespace in C programs to hide certain features or functions.