MarriageMaster

Commands:

 * /marry - List all marry commands
 * /marry - Marries two players, only for priests
 * /marry divorce - Divorces two players, only for priests
 * /marry list - Shows all married players
 * /marry tp - Teleports to the partner
 * /marry sethome - Sets the home for two married players
 * /marry home - Teleports to the home of married players
 * /marry chat - Allows to chat a couple private
 * /marry chat toggle - Toggles the chat to send all chat messages to the partner instead of to the public
 * /marry pvpon - Turns PvP between two married players on
 * /marry pvpoff - Turns PvP between two married players off
 * /marry kiss - To kiss your partner
 * /marry gift - Gifts the item in your hand to your partner
 * /marry backpack - Opens the backpack of your partner
 * /marry backpack on - Allows your partner to use your backpack
 * /marry backpack off - Disallows your partner to use your backpack
 * /marry me - Sends a player a marry request
 * /marry priest - Sets a priest
 * /marry listenchat - Shows the marry chat
 * /marry reload - Reloads the configuration of the plugin

Website
http://dev.bukkit.org/bukkit-plugins/marriage-master/