org.bukkit.inventory
Interfaces 
AnvilInventory
BeaconInventory
BrewerInventory
CraftingInventory
DoubleChestInventory
EnchantingInventory
EntityEquipment
FurnaceInventory
HorseInventory
Inventory
InventoryHolder
ItemFactory
MerchantInventory
PlayerInventory
Recipe
Classes 
FurnaceRecipe
InventoryView
ItemStack
ShapedRecipe
ShapelessRecipe
Enums 
InventoryView.Property