Korcraft/barrel

This mod was added in Korcraft 1.3, and adds 3 new blocks that are designed around storage to the game.

Blocks
Barrel- Similar to a chest but can only store 1 item type, but it can store 64 stacks of that item.

Ender Barrel- An enhanced Barrel capable of storing 1024 stacks of an item.

Quantum Barrel- The highest tier Barrel, holds 4096 stacks.

Uses
Barrels function with Buildcraft pipes and can be used to hold various materials such as cobblestone and dirt in a compact manner, or to provide exactly the item needed to a machine without taking up the room a chest would.

Official thread/wiki/site
Barrel Mod thread on Minecraft Forums