Minecraft wiki entry for Friendly_Update, associated text: Realms, which requires logging into an Xbox Live account
Achievements for iOS and Android devices
Online multiplayer via Xbox Live
Pig riding
Pistons and sticky pistons
The observer, a block update detector.
Sheep now drop mutton.
Tipped arrows, which are made by using cauldrons
Leather horse armor, which can be dyed.
Seven new mobs: horses, mules, donkeys, skeleton traps, zombie horses, strays, and husks.
Name tags
Leads
Fire charges
Carrot on a stick
Villages now spawn in taiga biomes and ice plains biomes.