Grasshopper for Rhino is a big one, or VisualCAD/CAM. Blender, Houdini, or Unreal Blueprints are others. It gives you the exploration benefits of a UI plus the procedural benefits of code. Inputs tend to be auto-bound which makes exploration much, much faster.
I'm working on one for web map data visualization: https://youtu.be/GJ0ftFB8r4I?t=871