RFTools Modular Storage
The Modular Storage Block is an advanced chest. Before you can use it you must insert a storage module. There are three tiers: 100, 200, or 300 stacks. You can insert modules to make the chest work better with various types of items. When you remove a storage module from a Modular Storage Block the contents will be copied to the module.
The various item modules allow you to sort and group your items based on various criteria.
Here you can see an example of a the GUI of a modular storage block configured to show dimlets:
And here is how it can look like in your world. It gives a visible indicator of how much items are in the storage:
