Multiverse Inventories allows you to control who and what can cross world borders!
Portals module for Multiverse-Core
Nether Portals module for Multiverse-Core
The Bukkit World Management Plugin.
Lay down the law on spammers!
A simple way to restock chests and a unique way to give items
Lock your doors and chests and make keys that open them up
Spawn Eggs place Spawners. Spawners drop Spawn Eggs.
Run powerful scripts when a player votes
An extensible, player-driven, chunk protection/ownership system.