A container that arranges its child controls in the shape of a pyramid. That is, the <biggest included power of two> nodes will form the base layer, with the amount of nodes on each subsequent layer being halfed, until all nodes have been assigned:
While there might be further applications, this container was primarily developed to draw tournament brackets. That's why it includes code to automatically draw lines that connect two nodes in one layer to one node in the following layer:
The demo shown in the GIF above is included in this repo here.
Once the plugin has been enabled in the Project Settings, its documentation can be accessed directly from Godot: press F1, then search for "PyramidContainer".