First time I learned about SETL at NYU was when I was learning about Spitbol.

Here is a fizzbuzz in Spitbol. Probably not the best way to do it.

      var a = 0;
      start
      +a = a + 1;
      break
      +lt(a,101) :f(end);
      x01
      +x = (remdr(a,3) + remdr(a,5)); eq(x,0) :s(x06);
      x02
      +y = remdr(a,3); eq(y,0) :s(x04);
      x03
      +z = remdr(a,5); eq(z,0) :s(x05)f(x07);
      x04
      +output = 'fizz' :(start);
      x05
      +output = 'buzz' :(start);
      x06
      +output = 'fizzbuzz' :(start);
      x07
      +output = a :(start);
      end
      

More: http://www.hakank.org/setl/fizzbuzz.setl

He also has pages on APL and k.