Redstone (Minecraft)

Redstone is a useful item in Minecraft, and is effectively electricity. Through the use of glitches and uses that were supposed to be in the game, it can be used to make various circuits and programs.

Building
Although its primary use is the activating and creating of various circuits, it can be quite effective as a building material, as it can pose as blood, and ruby blocks due to the addition of redstone blocks.

Circuitry
The primary use of redstone is circuits. They are used for all sorts of reasons, from teleporting players to prison islands, to building TNT cannons, to creating mob spawners, to make doorbells, and even make a calculator with 4GB ram! (That actually happened once, and was the single largest redstone circuit ever made, especially since they had to make an actual computer chip and CPU.)

For more information, see the Redstone category.