Bukkit

"Lockdown" your server while doing maintenance, or just de-griefing!

McDefcon - Lockdown your Server

CommandHelper

An improved command system for Bukkit, that uses individual classes for commands.

XoXAdmin

A simple mob spawner plugin

Pause chat, Deny cmd's and more!

Minigame library for Bukkit

Hidden Lore

It allows players to add one basic command for server affiliations.

Want to make simple minigames but aren't familiar with instances and constructors? Then this is the API for you!

Create holograms from images, txt files, commands and other plugins

LlamaCore - a lightweight API for Devs

API for creating events and games

PPermissions

CustomTabs

MinigameManager

EntityAPI

SimpleAntiCaps

Allows players to bind commands and scripts to blocks