Bukkit

iBroadcast

Mimics the well-known IRC services like NickServ, MemoServ, ...

A Word-Changing plugin

A PopUp MOTD for servers

[ADMN/INFO] PistonAlert v3.1 -Warns players and admins, if placing a piston! +Database![1060]

Anti-Greif Notifies Admin/Server when player places defined block!

Bukkit GUI

MCNetwork

your best announcer tool ever!

RiseWelcome

Grummday

Super Awesome Animated Menu

WebCommands

Essentials Red

Ever wanted a stock market on your server? Now you have one

Bukkit + Twitter = Bukwitter :)

Modbot

This plugin allows dueling for one and one person duels

Perform configurable actions when a skin type (edgy teenager) is detected

Have you always wanted to have a feedback for all users on your server that with it can give ideas? Feedback+ is your solution!