SuperSkyBros

WorldEdit for Bukkit

WorldEdit is an in-game map editor for both creative and survival

CleanroomGenerator

Creates cleanroom-style flat world generator with fully customizable layers. It can also be used to create empty space maps!

Vault

Vault is a Economy/Permission plugin for hooking into the various Economy and Permission plugins.

ProtocolLib

Library for intercepting sent and receieved Minecraft packets.

Lіb's Dіsguіses

Disguises which doesn't suck