This is the ULTIMATE crafting datapack.

Not all of the features will be listed here, so if you open the .json files you may be able to read them.

Features:

Re adds "notch apple" crafting
Allows magma blocks to be crafted into magma cream
Allows most things to also be smelted in a blast furnace (not faster yet, work in progress.)
Allows you to upgrade your items by placing the next material to the left of your sword / pickaxe
Allows you to smelt your damaged diamond armor (also working with blast furnace) into 1 diamond.
Crafting an upside down chestplate with phantom membrane creates an elytra
Craft a trident by placing 2 sticks at the bottom middle, and make a "boots" formation at the top and put a rotten flesh at the top middle slot.
You can craft saddles and iron, gold, and diamond horse armor. (saddle is leather helmet with string inside) (mineral horse armor is just crafted like leather horse armor)
Surround a bookshelf with 3 bottles to make bottles o' enchanting
Create sheep, cow, and pig spawn eggs by surrounding it in their meat (wool for sheep)
Create chainmail armor by crafting iron armor with iron bars
Create spawners like you would create a furnace or chest, just with iron bars.
Craft a skeleton head by creating a helmet out of bone blocks.
Smelt skeleton heads to create wither skeleton heads.
Create sponges by surrounding a peice of sand in 4 buckets of water.
Create the heart of the sea by surrounding a nether star in prismarine crystals.
Surrounding a cow spawn egg in red mushrooms turns it into a mooshroom spawn egg.
Placing two blocks of coal right next to each other makes 5 obsidian.
Surrounding a water bucket in varying amounts of snow blocks creates ice.
Create a shulker shell by making a "helmet" of chorus fruit.

I could go on and on, but like I said, just read the json file and you will find out the recipes.