MultiBana

Break natural leaves while you ride a horse

Removes baby zombies

Repair elytra with leather (and disable phantoms)

Removes Granite, Diorite, Andesite, Tuff

Revamps the core mechanics and removes the bad features

Craft a bed with mixed wool colors

Endermites don't spawn when using Ender Pearls

Removes EXP and revamps the enchanting system

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

Removes infested blocks