This mod will allow you to use the creative inventory on most multiplayer servers and in singleplayer survival. The hack will unlock some hidden files that will make it possible to take an infinite number of resources, weapons and armor.
How to get creative inventory?
It is sufficient to establish this .mcpack, and then choose in the settings the "Classic inventory". Now when you click on the E button, you can open your inventory, and on either side of him the whole list of available resources.
How to use the hack on the Server?
Some popular servers took into account this bug and use the hack will not work, but most administrators are not even aware of the existence of such hole in the game code. I played on some servers and was able to get most of the items, for example diamond or another armor, elytra, and other resources.