Does anyone know how to get this inventory model?

[RealSprate (Sprate)]

I’ve seen a lot of games using this inventory model, like dead rails, dead rails copies, restaurant games.
I think its free but I cannot find it.

It also has this topbar icon, the icons are different but it has this button to open the inventory.

Does anyone know how to get it?

[4_0gt]

I think its this:

Satchel - Open-source modern backpack system

[Satchel] Satchel [GitHub Release] [Docs] [Playground] [Discord] [Mentioned in Awesome Roblox] Warning Satchel v1 is unmaintained to focus on v2 development. For a maintained alternative, see Purse. Satchel is a modern open-source alternative to Roblox’s default backpack. Satchel aims to be more customizable and easier to use than the default backpack while still having a “vanilla” feel. Installation of Satchel is as simple as dropping the module into your game and setting up …