Pepsi's Easy Multi Item Sorter
Building multi-item sorters in Minecraft has always been challenging - constructions often broke, required many resources and time. Existing solutions didn't satisfy me: some were too expensive, others - too bulky or slow.
That's why I developed this mod. Instead of chaotic redstone and minecart circuits, you get a simple and elegant system.

How It Works
Place an item frame on any container connected to a comparator. This container becomes the filtering one.
Put any stackable item in the filtering container, making sure there are at least two units. These items will be filtered by the system.
Important: the container must contain at least two identical items, otherwise filtering won't work.

The filtering container will take items matching its contents from any containers located above. Typically, a chain of hoppers is used for this. As items move down the hopper line, filtering containers capture all suitable items.
Filtered items go into the hopper located directly under the item frame:

This hopper can be directed to a chest for storing sorted items. You can also connect it to another hopper or replace it with a chest - any item container will work.
Don't place a hopper under the filtering container - this will disrupt the system's operation. The hopper should be under the frame, not under the container.
Speed Settings
Using hoppers that work faster than standard ones? Like Super Hopper? In that case, you'll need to adjust the filtering speed. By default, the system works at 1 item per 8 ticks, like a regular hopper. But you can speed it up to 1 item per tick using the command:
/trigger easy_mis_fast_mode
If you have a weak computer, you can slow down the operation by 4 times:
/trigger easy_mis_slow_mode
Return to standard speed with the command: /trigger easy_mis_normal_mode
I recommend using regular hoppers if your computer doesn't have high performance.