Bukkit

A Simple Plugin which adds Commands to a sign.

Implements new game modes and commands into your server.

Creative (+NBT) copy feature under your control.

Plugin that logs player/IP combos and allows for a nice developer API to easily retrieve that data

High performance sign-based lock plugin, highly customizable, UUID support.

CreativeMonitor - Take Control Of Your Creative Players Once And For All!

An Apache Thrift based API for your Bukkit server

a PvP Bounty mercanary system

This plugin is used to watch the chat of players, manage your worlds and more!

A set of extra commands for your server

A very easy-to-configure item ban list, with default values for commonly-banned Tekkit items.

RestrictCreative

ConsoleScheduler

An add-on for Chunky which lets you create and manage world borders

Simple timed announcements/news messages

Make regions that players can buy/sell

Steel Security

DwarfCraft - Player progression plugin with skills that are improved by training(not xp)

Allows logging (and Canceling) of itemID events

Mineload