Bukkit

AFKCoords

Logs chat with a time stamp and records it into text files

PatternChat

A plugin for Bukkit servers that adds functionality and commands to make sending whispers to players easier.

[no updates]

A Highly configurable Discord-Minecraft Chat Bridge Plugin

Kick players advertising for other servers

ChatManager+

Make polls for your server!

This plugin keeps you chat log clean of spammers, advertisers, and people using full caps.

Superplugin

Add redeemable codes that give you items or money!

Allows players to change their name color in the chat

Adds motd and any other informative commands(customizable) you'd like

Welcoming And Leaving

Better messages for your server, join/leave messages, world change messages and more!

Connects dynmap's webchat with CraftIRC3

Mutechat plugin

Chat going out of hand? Disable global chat!

Join and Quit Messages