Jail bukkit plugins 1.6.4
This plugins adds Jail to your minecraft server. Admins can define several jails and then jail/unjail people or jail them on time basis. Plugin also offers wide variety of protections, so players won’t escape out of your jail.
Jail online and offline players
Wide variety of protections to prevent escaping or simply to create more interesting escape route on role play server.
Protection penalties (increase jail sentence if player is not behaving well)
Guards that will kill player if he tries to escape
Data is stored in either SQLite or MySQL.
Supports multiple worlds
Jailing without commands via item
Supports escaping for role play servers.
Allows players to vote a player to be jailed
Download here : http://www.5minecraft.net/jail-bukkit-plugins/