Item Frame

The Item Frame is an upcoming item similar to a display case. It displays the item or block that is inside it. The displayed item can be rotated by right-clicking the frame. Maps show their contents, and compasses and clocks work as normal. When broken, the frame drops both itself and the item it contains. Because item frames are technically entities like paintings, they can be broken in Adventure Mode.

Uses
Item frames can be placed on cactus blocks, fences, slabs and cobblestone walls, along with all solid blocks.

The player can use item frames to hold items for convenient retrieval or reference, instead of having to open a chest or dispenser to retrieve or verify specific items. This means item frames can be used to label chests, dispensers, etc. This also allows working clocks and compasses, as well as maps, to be displayed against a wall. A map put into an item frame will show markers at any other item frames with maps in them. This is a good way to mark certain areas.

Items frames can be used to display crafting and brewing recipes, and can also be used to hold fire, allowing for safer fireplaces.

Since items in the frame can be rotated, this allows for directional pointing using items that are shaped like pointers or wedges - such as arrows, tripwire hooks, flower pots, redstone, etc.

Since levers, torches, and buttons can be placed against the item frame, this allows for color-coded levers (using colored wool), decorative torch holders (using slabs or trapdoors), and decorative gold trims for buttons (using an item frame inside the item frame). Item frames can be used similarly as signs, allowing for decorative armrests for chairs.

Using item frames are a handy way to clone enchanted weaponry or tools in Creative mode.

Bugs

 * The Pick-Block key gives the item in the frame, as opposed to the frame itself (may be intentional).
 * Torches can be placed on item frames, but only indirectly (possible feature)
 * Placing an item in a frame while it is in a stack will cause the player to lose the stack of items; breaking the frame will only give the player 1 item in return.
 * If the block an item frame is placed on is moved by a piston, the frame will not move. However, the frame will break upon walking into it.
 * Placing a water or lava bucket in a frame will sometimes cause the water or lava be placed down as well as having the water/lava bucket in the frame. The water and lava will stay there forever. A block update will not make the water flow and the lava will not hurt the player or destroy items allowing infinite water/lava in a 2x1 space.
 * When placing an enchanted item in the frame it appears unenchanted.

Trivia

 * The item frame is based off a suggestion on Reddit, like the Ender chest and flower pot.
 * Item frames can occupy the same block as water without popping off.
 * Items appear flat in the frame while blocks protrude from it.