Bukkit

Join and Quit Messages

ServerMessages+

FirstJoinMessages

A Plugin to Change the Join, Leave, Kick and Death Messages on your Server

SignWithLink

A simple plugin that displays your chat messages above your head for a configurable time

CrazyCaptcha

Yells titles and subtitles

Sends the player a message when they enter a new biome

Announcements

Easy using interface, like chestcommand.

AdminCommands gives server OPs complete control with gamemode management, player utilities, chat moderation and admin spy

JoinAndLeavePro

CustomJoin

Show text or run commands via a button

CensoredChat

Chat format plugin

The lightweight Minecraft chat prefix, rank, and tablist management plugin.

Privately talk with all of your staff at once without using any commands.

SimpleUc