MultiBana

Removes infested blocks

Revamps the core mechanics and removes the bad features

Removes Granite, Diorite, Andesite, Tuff

Removes baby zombies

Endermites don't spawn when using Ender Pearls

Removes copper, with iron replacing it in the few "uses" it has.

Removes EXP and revamps the enchanting system

Repair elytra with leather (and disable phantoms)

Craft a bed with mixed wool colors

Break natural leaves while you ride a horse