Bukkit

CH Commands

SupportChats

VoteInformer

The plugin shows the staff simply.

Easy to use Command Logger plugin

NoChatSigns is a plugin that uses signs to define areas that players cannot chat in.

chatterbox lets you use a Minecraft servers chat on a website.

Shows the difference between PvP deaths and PvE deaths

Chat Emoticons

Adds flags to WorldGuard to modify the chat for players that are in a specific region

SuperSpy

A simple Chat Filter everyone can use

SimpleTickets is a easy ingame ticket system that should help to manage any amount of support needing players.

Easy timed console commands

vFakeMessage

Massive collection of brand new recipes for your server!

Pchat

This plugin allows you to customize player join/quit messages!

Better Death

Prank your friends with two new commands.