Bukkit

DreamGuest

An amazing plugin for achievements and player titles!

Send an world wide alert.

This plugin promotes a user inputs the correct password.

A plugin that will give you tons of commands that will be useful when developing your server!

A simple shout plugin that lets your users do /shout <message>

SpamX

NexusUHC

chat color plugin with gui and join permissions

ChatCensor, StaffChat, JumpPads, Welcome Message, TitleBar, Tablist, ChatControl

NoJoinMessage+

Add Fully Configurable Info For Players[With Colorcodes & Permissions]

Don't allow bad players to do bad things on your server!

A lightweight way to filter your server's chat.

Show players running Minecraft 1.8.3 or lower an animated MOTD

LagFinder

clear chat clearchat dissapears null Smart Chat Clear

NYCommands

A simple and one-of-a-kind chat mod for CraftBukkit. This should be fully compatible with other chat mods!

This Plugin can tell you what a specific Player has done in a specific time.