Bukkit

MCPig

Simplifies building and creative mode management

Provides basic functions to inform your players if the server is under maintenance.

Authorize anyone to use for free.

MultiCoders Plugin

V1.0 A simple ranking plugin [1317][PEX]

Touhou Player Enhancements

Help Plugin, Customizable /help page!

Minecraft Anti-Cheat

MC-up

Plot System!

Allows you to manage groups in-game, such as ranks or parties

advanced godmode, with lots of features

Ultimate Items Mod

Commands you really should get

RosterMod

X-Ray Detective

ElTools is All-in one useful feature pack.

LocalAdmin

VoteBuddy