Bukkit

El.Mob disables some monster abilitys like the teleportation of endermens or the explosion damage of creepers.

HubGadgets is a simple and nice plugin to add some cool things to your Hub :D

It's raining cats, dogs, and enderman!

Get an Elytra that only works once!

An useful set of tools to make sign editing faster and easier

Clans

Make fear your players !

Create blocks that are jumping

Hide all online players, great for busy hubs.

Gives your staff (or players) access to a whole array of useful and fun commands!

Planting in a 3X3 area with hoes

make harcore worlds or just use as an administration tool for per/world banning/tempbanning!

PlayerFinder3000

A Kit PvP Plugin that uses an exp leveling system!

This plugin lets you callout people

ShortCutPlugin

Ballistics

Brew wine and get a potion effect based on the wine's real world attributes!

Your house in your pocket !

world generator based on sethbling's MCEdit filter