Can't recommend Stylus enough. Some features not found on less or scss: optional colons, semicolons and braces and referencing properties:

  body
    color black
    a
      color @color

will compile to

  body{
    color: black;
    a{
      color: black;
    }
  }

And you'll never have to worry about the missing semi-colon error from the article!

+1 for Stylus.

Very pythonic. Me likes!