Gunpowder

Gunpowder, formerly known as Sulphur, is an item that can be obtained by killing Creepers, looting dungeon chests, and by killing Ghasts.

Uses
Gunpowder can be crafted into TNT, and it can be brewed with any potion to make a Splash Potion.

History
In Indev, mob drops were randomized, so when a Pig was killed it could drop gunpowder instead of Pork (seen here).

In Beta 1.0, Gunpowder was renamed Sulphur, but reverted to its original term in Beta 1.3.

In Beta 1.9 pre-release 4, gunpowder was made usable in brewing to create Splash Potions.

Schießpulver Sulphur/es Poudre à canon Puskapor Gunpowder/ko Buskruit Proch Порох 火药