Storage Silo Mod for Minecraft 1.9/1.8.9 allows a large amount of storage (999 stacks) all from a single block. The block has a GUI not dissimilar to the ME Terminal from the Applied Energistics 2 mod. The StorageSilo has no power requirements though, so is an ideal high capacity item storage solution for those who prefer their game play without complex power systems.
Download link: Storage Silo Mod for Minecraft 1.9/1.8.9