Bukkit

WorldGuard

A collection of useful commands and features for server admins and players.

EssentialsX

Allows server admins to easily modify how Minecraft works without programming anything

SetSpawn

Plugin Manager For Bukkit

Change your ingame skin

Tablist

A plugin which teleports you to your set home.

Fully customize any mobs (and create custom mobs) with a powerful scripting skill system, attributes, equipment, special AI, and much more, along with custom spawners and spawning rules. The ultimate plugin for making RPG servers and minigames.

mcMMO

ServerSigns - Bind player and server commands to signs [1337]

BukkitGUI - the most downloaded GUI for bukkit and any other server

An addon to the popular addon Skript that exposes the Bukkit API to general server owners

Change the colour of the server chat!

Bssentials GroupManager

#1 Scoreboards plugin!

Unique and challenging custom achievements or quest-like objectives on your server! Books, fancy GUI, rankings, rewards, effects and more!

Lightweight Essentials

Delay | Block /spawn on PvP | Lobby Friendly | Customizable Messages | And Much More