Bukkit

Players are now able to trample the grass

Launchers

WorldProtection protects your world from griefers!

MULTIPLEWORLDS

This plugin prevents the crafting of certain items, these are: Hoppers, Ender Chests, And God Apples/Golden Apples

Advanced Effect plugin

Allows map creators to interact with parts of the Bukkit API.

A schematic manager that makes saving and loading the states of WorldGuard regions easy.

Unbound Blocks gives you the ability to place blocks at any position in the world, regardless of the grid provided by Minecraft!

A plugin which allows users to make empires and claim land

NoMobs

A simple Difficulty plugin with an integrated GUI

Schedule backups and saves of worlds

iWarp - Multi-world Warp Creation Plugin

Bonemealer

BattleNations

Creates copies of worlds, which can be reloaded on command

When Player Joins Item Is Given

Everyone deserves their personal world!

ist ein plugin :D