NoxRadarJammer:
http://dev.bukkit.org/bukkit-plugins/radarjammer/

PvEManager
http://dev.bukkit.org/bukkit-plugins/pvemanager/

PvPManager
http://dev.bukkit.org/bukkit-plugins/pvpmanager/

AntiInvisibility
http://dev.bukkit.org/bukkit-plugins/antiinvisibility/

AntiJoinBot
http://dev.bukkit.org/bukkit-plugins/easy-anti-join-bot-proxie/

Follow
http://dev.bukkit.org/bukkit-plugins/follow/

SecurityVillagers
http://dev.bukkit.org/bukkit-plugins/securityvillagers/

GroupManager (if one is not built into Sponge)
http://wiki.ess3.net/wiki/Main_Page