Grid Based Inventory System | Godot Inventory Tutorial - YouTube
Inventory Demo with bags and chests - Godot Asset Library
GitHub - zcaliptium/gdinv: More or less universal inventory system plugin for Godot Engine (3.3+). Data-driven.
Now OPEN-SOURCE! Dynamic Inventory System & UI for Godot (fully dynamic, infinite scrolling, item categories, equipment slots, w/ item database) - inspired by the Zelda Breath of the Wild inventory UI :
GitHub - expressobits/inventory-system: Modular inventory system for godot 4 with nodes, compatible with multiplayer, separate logic from the UI, Using items as separate resources.