Bukkit

The Most Wanted

Ventriloquist

Shows a custom motd to the players that join!

Set custom messages for players on join

create you own commands, in the config.yml and it will display text, run another command, or give/remove an item from a player.

Pushalot

Online Admin

WorldChat

This deletes the /pl command so other players cannot see what plugins you have on your server.

GermanJoinmessage

Trinkets

This plugin is able to edit the chat.

a few commands to help server staff keep the chat cleen

Plugin for private messages

QuietChat

Turns off join and leave messages.

[Code24] WTF is code24?!

Allows you to create commands for distance based chat via a config file

Announces a player IP on join

An allrounder