I need a plugin where you can make it so there is only a plugin usable in a certain world like the factions plugin only aloud in the factions world. Anyone know of one or something similar?
nah5000 There are ways to set this up. Most popular (or atleast populated) servers have multiple servers dedicated to run certain lobbies, hubs, etc. Then, of course, they will link the servers. I am pretty sure there are plugins or configuration out there, but I have seen this the most.
^^^^^^^ For a single server with multiple worlds just use a permission plugin like group manager or PEX and don't give them permissions for say... factions commands in creative world. Also make sure to turn mirroring off.
nah5000 I think this is what your looking for, enjoy! http://dev.bukkit.org/bukkit-plugins/perworldplugins/
Read http://wiki.ess3.net/wiki/Group_Manager/Config#Mirroring and have only users mirrored across over all worlds, then edit factions groups.yml and give faction permissions.