Bukkit

ChangeLog:

• Compatibility with MC 1.6.2
• Fixed some player teleportation bugs
• Added minecart block offset API
• Fixed negative minecart block type/data causing client crashes
• Added new 1.6.2 packets
• Added packet receive method
• Fixed support for ProtocolLib (silent packets)
• Improved utilities for creating IO streams (and NBT)
• New network controller for external plugin support
• Fixed MCPC+ support for some naming conflicts
• Javadocs updated and syntax fixed
• New Filter implementation with FilteredCollection
• New TabView API
• Villager is seen as a mob again
• Now has SportBukkit support (had issues with player sent chunks)

Known to conflict with SpoutPlugin and possibly other plugins that replace packet listeners. To remain compatible, install ProtocolLib.