SpaceSaver

This is a basic mod to compress many items to help save space with vanilla Minecraft items/blocks.

Ream of Paper
Carton of Eggs

Basket of Apples
Basket of Beetroots
Basket of Carrots
Basket of Potatos

Bag of Beetroot Seeds
Bag of Melon Seeds
Bag of Pumpkin Seeds
Bag of Wheat Seeds
Bag of Acacia Tree Saplings
Bag of Birch Tree Saplings
Bag of Dark Oak Tree Saplings
Bag of Jungle Tree Saplings
Bag of Oak Tree Saplings
Bag of Spruce Tree Saplings
Bag of Cocoa Beans

Crate of Leather
Crate of Cooked Mutton
Crate of Raw Mutton
Crate of Cooked Chicken
Crate of Raw Chicken
Crate of Cooked Steak
Crate of Raw Beef
Crate of Feathers

Block of Ender Pearls

Most basic blocks will have a Single Compressed, Double Compressed and Triple Compressed version of it.

More to come...