SoHi (Scriptable Object Hierarchy) for Unity
SoHi is a simple yet useful Open Source Library to handle tree-like data structures in Unity. It's based on a recursive property drawer that can traverse, show, and interact with a hierarchy defined by standard Scriptable Objects, directly inside the usual inspector.
SoHi provides the structure, and then you fill it with your content.
You can get the code here:
https://github.com/nicogaudenzi/SoHi_...
or here:
https://www.assetstore.unity3d.com/#!...
You can get the Koala Behavior Tree asset at:
https://www.assetstore.unity3d.com/#!...