Taken from a comment on CurseForge by Opprxssor66:

Demonite tools & weapons; upgrade netherite tools using Crimson Ingots and a "Demonite smithing upgrade template" which I'll describe below

Sword: Automatic Fire Aspect 2, also applies Wither to enemies on hit

Pickaxe: Auto smelts any mined ores (copper, iron, gold, ancient debris), and a right click ability that can break 3x3 areas for a short time (lasts 15 seconds, 2 minute cooldown), all drops are directly deposited into the player's inventory

Axe: Fells entire trees, a right click ability that temporarily grants strength 3 to the player (lasts 15 seconds, 5 minute cooldown), all drops go directly into the inventory

shovel- Auto smelts any applicable blocks, same right click ability and cooldown as the pickaxe, all drops go right into the inventory.

Hoe: Can Harvest a wider area of crops, chance for any crops harvested to smelted (if applicable- such as potatoes)

Demonite Upgrade Template: Crafted using the withered demon heart from the decaying king, 2 netherite ingots, 1 Crimson Obsidian, a wither skull, 1 lava bucket, 1 Demonite Chunk, 1 Crimson Ingot, and a netherite upgrade smithing template- to duplicate it, requires more Crimson ingots and obsidian (7 obsidian, 1 crimson ingot)