Herobrine
spawns in plains and drops leather.
Sandstone Herobrine
spawns in desert and drops sandstone.
Ice Herobrine
spawns in taiga and iceplains and drops ice.
Snow Herobrine
spawns in taiga and iceplains and drops snowballs.
Netherrack Herobrine
spawns in nether and drops netherrack.
Light Herobrine
spawns in nether and drops glowstonedust.
Slow Herobrine
spawns in nether and drops soulsand.
Mushroom Herobrine
spawns in mushroomisland and drops red- and brownsmushrooms.
Natural Herobrine
spawns in jungle and swamp and drops leaves and vines.
Forest Herobrine
spawns in forest and drops grass.
Ender Herobrine
Spawns in end and drops ender pearl.
Burrito Herobrine
Spawns in forest and plains and drops 4 boritos. (Thanks for the great idea TheHolyPork)
Troll Herobrine
Spawns in forest, extremehills and plains and drops paper.
Zombie Herobrine
Spawns in every biomes of the overworld and drops rottenflesh.
Aqua Herobrine
Spawns in ocean, beach, extremehillsedge and mushroomislandshore and drops waterbuckets.
Pirate Herobrine
Spawns in ocean, beach and drops iron- and goldingot.
Zombie Pirate Herobrine
Spawns in ocean, beach and drops iron- and goldingot.
Angel Herobrine
Spawns in extremehills and drops glowstonedust.