Leatrix Plus is an efficient and modular addon which offers lots of quality of life improvements to enhance the default user interface in World of Warcraft.
To see what this addon does, there is a list of features and a what's new guide at leatrix.com/plus.
Leatrix Plus is available for:
Click the minimap button or enter /ltp to open Leatrix Plus. For a list of slash commands, enter /ltp help.