Since I've been seeing alot of people saying they have Fire4's etc., I thought I should put this up, it shows all Enchantments and their max levels. =D

Armor Enchants:
Protection - 4
Fire Protection - 4
Blast Protection - 4
Projectile Protection - 4
Feather Falling - 4
Respiration - 3
Aqua Infinity - 1

Sword Enchants:
Sharpness - 5
Fire Aspect - 2
Knockback - 2
Smite - 5
Bane of Arthropods - 5
Looting - 3

Bow Enchants:
Power - 5
Punch - 2
Flame - 1
Infinity - 1

Tool Enchants:
Efficiency - 5
Unbreaking - 3
Silk Touch - 1
Fortune - 3
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So yeah, that's all the Enchantments in the game with their max levels!! =3