Fountain pens. They don't make custom alloys of gold specifically for their nibs any more because they're not ubiquitous. An old "wet noodle" italic Parker or Waterman is a writing experience to behold.
Try out fudepens too. Fountain pens, but with a brush end. Sometimes they're refillable (my preference), sometimes they're not. They make them with actual bristle brush tips, but also foam tips like calligraphy markers.