Bukkit

Multiverse Inventories allows you to control who and what can cross world borders!

The Bukkit World Management Plugin.

Multiverse-SignPortals

Portals module for Multiverse-Core

Nether Portals module for Multiverse-Core

Lay down the law on spammers!

A simple way to restock chests and a unique way to give items

Spawn Eggs place Spawners. Spawners drop Spawn Eggs.

Bukkit plugin/library that allows extensible javascript scripts to be run

Run powerful scripts when a player votes

An extensible, player-driven, chunk protection/ownership system.

Lock your doors and chests and make keys that open them up

Generate random items based on yaml scripts