Bukkit

Release your extra pets! Let others adopt them!

Let players use hashtags like on Twitter in the chat!

You can edit a sign with Sneak+Right-Click. (supports 1.7 and 1.8/WorldGuard/Essentials signs)

Speeds you up if you trigger a configurable event under configurable conditions.

Replaces most of the death messages with more laughable ones

MyClasses

AirDropBlocks

Creates Custom Jump Boosts with Items

Customize your Enchanted books

An all-in-one plugin for server's that contains a hub or lobby.

Exploding Chickens

Change player skins with commands and on join and change display names without Spout!

Advanced Effect plugin

Point player compass to the nearest player

Adds an explosive item to the game

Potion Commands is a plugin that allows you to toggle potion effects with simple commands

CleverChatBot

The complete Fireworks plugin!

This is a bukkit server plugin that will make your players love you! It adds magical spells to the game!

The HomeKeeper plugin is a useful tool for players on Minecraft servers to manage home locations in the game.