Bukkit

shorten urls in-game via Tinyurl

Adds fancy Advanced join/Leave messages

Isolate worlds from eachother

crm-chunkloader

Clean your chat and server chat - Limpe seu chat e o chat do servidor

GUI | World or Server ChatClear | No console spam | Clear chat for specific player only |

HeroKillMsg

CustomJoin-LeaveMSG

A plugin that allows you to keep saved messages as emails

A ChatClient for the corresponding ChatServer Plugin

A simple plugin of custom enter and exit messages

Put your server in lockdown and block everything!

Say Hi Server

Simple welcome messages with fireworks.

Zepther

Region Chat using WorldGuard

SimpleBroadcaster is a plugin wich broadcasts messages configurated by you, in a random order. Very simple!

Minecraft Messaging

Stop those pesky people potty-mouths with SwearNot

ColoredTablist