Bukkit

Necessary is a multi-functional tool that adds some useful mechanics, commands, tools and other things that make the use of a minecraft server professional and easy

Awesome Bans and punishment system that utilizes MySQL for

Stop users from PVPing while in fly/god mode in Essentials

Your all-in-one griefing plugin! Launch nukes, airstrikes, flamethrowers and much more!

RealTimeSet

With this plugin installed, if you are not OP, and you place TNT, It will change it to cake and give you a message.

A very efficient plugin

The best Chat plugin in Bukkit featuring tons of customization and UUIDs!

PsuedoMe - Make other players chat things!

MegaTools

A fun beginning plugin for your server!

NoBreakDoor

Essential tp request commands

BetTools, the successor of iSimplyHeal.

SimpleSetHub

Nicknames

Be Thor and Control the Element, Lightning

GuiRedeemMCMMO

Give skulls and Set Time to Day/Night and use Nicknames with /nick

Swap two players positions Even if they are in two seperate worlds!