Bukkit

Custom recipes plugin

Allowes you to create Pairs and to filter mined blocks within these Pairs.

Endlessly flowing water and lava

Yells titles and subtitles

Paintball guns in Minecraft

Reward your players for doing work on your server

Hangman in Minecraft - The best, but simple chat game

Achievement

Add legendary armor to your sever!

Throw stuff with commands

PistonsPlus

ReversiLab

PumpkinStep

Create books for casting spells

Vertigo

HygienePlus - Your body needs care!

Magic Explosion

MCClans

An RPG horse management plugin

A customizable display which shows a player's potion effects.