This mod will change the friendly player's name on their nameplate if they are in your party (regardless if you are in an actual party or raid). This is helpful to quickly identify those in your party/group while in the open world. This has no impacts to instances since Blizzard blocks the friendly nameplates from being modified there.
Note that you must have Friendly Nameplates enabled for this mod to work. It does not work if you are only showing Friendly Names.
Thanks to Xet for the idea and testing it out with me!