Bukkit

A fun alternative to towny/factions with unique features.

A simple, effective and customizable quiz plugin!

Nickname & Skin changer plugin

NewTag - Give your players a tag independent of any permission or chat plugin

iFail!

SpamBots got you down? Put them down!

NxtorPlugin includes various commands including admin tools, chat related, teleportation and Anti-Grief

Put your server incharge with SAI(Server Artificial Intellegence)

ChatWarn

Tribe management

mmoChatTitle

Add 4chan-style quoting to server chat

No longer see chat from other worlds

AutoAnnouncer

User defined Chat Rooms

MCAdmin-Chat

reChat

This plugin adds in 20+ commands for any admin that they can't simply use with just in-game cmds

ChatUtils adds several functions to the chat, including colors, logging and caps blocking.

Permission based announcement plugin.