Bukkit

Juke boxes will loop.

get paid for mining!

Transfer enchantments from tools and armor into books.

Allows you to create anvils that don't wear out.

Carry your horse in your back pocket.

Bukkit plugin that allows smelting armor and tools into raw materials.

Turn droppers into redstone-powered automatic crafting tables.

Changes a players health based on his XP level.

Makes jukeboxes auto-play, repeat, and loop through records in a chest.

removes the ability to repair tools and armor in the crafting grid.

Turns Poisonous Potatoes into Potion-effect landmines!

EnhancedFishing

Protect your pets!

Adds Enderchests which contain pre-made buildings you can pick up and move.

Adds an inventory to saddled pigs.

Turn hoppers into machines that compress items into storage blocks.

Notify Players and run arbitrary commands when Mojang servers are down.

A very simple bounty plugin

Allow time-limited flight within Towny town borders.

Allows players to emit configurable potion effects like a beacon!