ItemProtoset
InventoryItem
Inventory
InventoryStacked
InventoryGrid
InventoryGridStacked
ItemSlotBase
ItemRefSlot
ItemSlot
CtrlInventory
CtrlInventoryStacked
CtrlInventoryGrid
CtrlInventoryGridEx
CtrlItemSlot
CtrlItemSlotEx
GLoot
(auto loaded singleton)
If you want to take a look at the source code for all of the above, the page describing the source code organization could be useful.