I remember MRP, and I remember GHI... but I'm also remembering a third RP addon in WoW that (at least when I was last playing seriously at the end of WotLK) was starting to replace both of those on my server. It was like MRP and GHI rolled into one. It was a bit quirky and crashed often -- my memory is suggesting that we might've been beta-testing it, as I can't find it on Curse anymore -- but we LOVED the book-maker and the ability to puppet minions/pets/NPCs to other users without having to use brackets.
