BukkitExtras is a plugin that adds many miscellaneous useful things like: Transportation/trading of animals, more uses for hoes, elevators, ability to get skeletal and zombie horses in survival, Wand of Trading to swap blocks in the world.
Put any owned animal into a name tag by shift right clicking it
Release a animal in a AnimalTag by shift right clicking a block with it
Can trade the name tags with animals in, new owner can release them and if its a tameable animal it will set its owner to them
Shift right click a animal with a book to read its stats
Special Horses
With enough rotten flesh or bones, you can turn any owned horse into a undead or skeleton horse by shift right clicking the horse with the item
Elevators
Block defaults to lapis block
Space to teleport to closest elevator block above
Shift to teleport to closest elevator block below
BetterHoes
Break a crop with a hoe to auto replant it
Right click a crop with hoe to auto grow crops and use bonemeal required
Right click tilled soil with a hoe to plant any seeds in the next slot of your inventory
Break sugarcane with a hoe to auto break the 2nd lowest sugarcane, will not break the lowest sugarcane
Will never break any non fully grown crops
Works in a 3x3 area
Wands
Trading
Shift right click to set its block
Right click to transform a block if you have it in your inventory
Crafting
Right click to open crafting table gui
Ender
Right click to open your ender chest gui
Enchanting
Right click to open a enchanting table gui
If your standing near to bookshelves, its max level will go up
When pigs breed they give 1 to 3 babies to make them actually useful
Shearing sheep gives 1-3 string
Shops
To create a shop, place a sign with "[shop]" on its first line, then place a chest up to 5 blocks below that, and a chest up to 5 blocks below that
To add something to be sold, put it anywhere on the first line of the first chest
To change what your selling it for, place what you want to sell it for below it in the inventory
It works with stacks too
The second chest is for stock and payment, put all stock your selling in it, will receive items from trades
To use a shop, right click the sign, click on any item that says "Can be purchased" to buy it, will give you the item(s) and deduct the item(s) from your inventory
Custom Enchantments
Feller
Applies to axes only
Max level of 4
When breaking a log with this enchantment, it will break all other logs above it depending on level
Higher levels break more blocks upwards
Level 3 or 4 will also search in a 3x3 area
Fiery
Applies to pickaxes and shovels
When breaking a block with this enchantment, it will auto smelt the drops
Also applies tools fortune levels to smelted drops, so iron ore will give extra iron ingots