reorderablelist
There are 4 repositories under reorderablelist topic.
Cyanilux/ToDo
Unity in-editor to-do list, attached as a component and uses a custom inspector based on ReorderableList. Also see branches for ScriptableObject / cross-scene reference version.
CristianQiu/Unity-Editor-PolymorphicReorderableList
Unity project where I use the SerializeReference attribute to make a custom editor with a reorderable list of polymorphic, non Unity objects.
Demkeys/UnityReorderableListExamples
Two very simple barebones examples of how to use Reorderable Lists in Editor scripts