Yes, this Golden Helmet does actually have ALL Enchantments in Minecraft. List of Enchantments: Protection 10 Fire Protection 10 Blast Protection 10 Projection 10 Respiration 10 Aqua Affinity 10 Feather Falling 10 Power 10 Punch 10 Flame 10 Infinity 10 Unbreaking 10 Fortune 10 Sharpness 10 Smite 10 Bane of Arthropods 10 Knockback 10 Fire Aspect 10 Looting 10 No, this is not Sparta, it's Madness...
Actually, in this case, no. Too Many Items can't add the enchantments which aren't specific to the item. In this case, it seems he made use of some MCEdit filters to put them on and rename it like that.
Oh yes. Forgot that bit. Must have been a enchant plugin on a bukkit server or a mod. Could be MCEdit like you said.