The Maggid of Mezeritch told the Baal HaTanya to put together a Shulchan Aruch for Chasidim. The result is the Shulchan Aruch HaRav, which is used as a final authority for halacha in Chabad communities in most cases. Wikipedia asserts that it is used as such by "most Hasidim", but in my experience I have not seen it on the shelves of Chasidic shuls or batei midrash.
Do any other communities rely on it as a final authority rather than the Mechaber, the Rema, the Mishna Berura, the Kitzur, etc.?
Which communities rely on which other texts is also interesting.