The addon would probably be HolyHope. Two main spheres covering Blessings and Seals, with a third kinda useless sphere. It can be found at
http://www.curse.com/downloads/details/5063/.
Be warned though. Last update on Curse was 3/2/07. I don't think the current author (different from the original who made the mod) is really that interested in keeping it up to date. Which is sad really. It was a great mod originally and saved me a lot of bar space.