WowAce

Alternate Power- and Combopoint/SoulShard/HolyPower-bar

FuBar_HonorFu

PT3Browser

Reduces interface tedium by doing the little things for you.

Shows where the equipment of inspected users or yourself is from.

Death analysis tool

Does stuff for sachmo

Shows you a much bigger icon selection frame

Allows the user to preview and track their progress in the collection of various transmogrification appearance sets

Show all the leyline taps in Suramar

A replacement tradeskill window

Does stuff for sachmo

View bank, inventory, mail, equipped and guild bank contents from any character anywhere!

Shows ZoneInfo on the World Map in a perfectly cromulent fashion.

Barks at you when you target a crowd-controlled unit

A library to help with localization of in-game subzone names.

Displays the remaing cooldown of the action you tried to use

Show what quests have changed

Omnibus

OneBank3 will combine all the bank bags into one frame.