Spawn eggs for all the mobs (Enderdragon, Wither, Wither Skeleton, Snow Golem, Iron Golem).
Combining 2 tools/weapons/armors in the crafting table preserves the enchantments if they are the exactly the same on the 2 items (Be careful, a bug makes it not work if you shift-click to get the item, just left click if you want the enchantment to be preserved).
Health Draining enchantment on swords, levels 1 to 2, the attacker drains as much half-hearts from the hit target (customizable frequency and min level).
Health bonus enchantment on chestplates, levels 1 to 3, adds as much hearts to the lifebar (customizable frequency and min level).
Autosmelting enchantment on tools that automatically smelts every harvested items (incompatible with Silk Touch, customizable frequency and min level).
Speed enchantment on boots that gives constant Speed I potion effect (customizable frequency and min level).
Spiders can drop cobweb (customizable probability).
Creepers can drop TNT (customizable probability).
Some of the arrows used to kill a mob are retrieved (customizable probability).
Endermen always drop at least one enderpearl.
Witches drop more potions types and more often.
Sheeps, horses and squids drop meat (if you have installed Lots of Food mod that have the same feature, the animals should not drop both mods items, but I recommand to disable this feature in the config file, just in case).
Tools, swords and armors dropped by mobs are less damaged.
Players can drop their head (customizable probability).
Mobs can drop their skull (customizable probability).
Animals killed by fireballs drop cooked meat.
Mobs can have random potion effects on spawning (customizable probability).