WowAce

Warnings about tanking specific abilities

KillingSpree

Show all the leyline taps in Suramar

LDB data source for herb, ore and skinning node data

Note + rep tracking for players, with guild data sharing.

Provides the /in command for delayed execution.

Doublerightclick casting, autolure and sound enhancing

FuBar_ExperienceFu

A customizable view of friends and guildmates.

Keeps a list of all items you want and shows how much you need.

Historian

Dropdown library for Ace3 options, extensible to other options formats. Works ok.

Displays information about the current zone on the World Map, for WoW MoP Classic

T_ItemInfo

Replacement for default bags.

Simple and clean Death Knight displays

ShadowGreenLight helps you decide if recasting SWP/Corruption is worthwhile

Information display for Hunters.

Allows the user to customize the the tooltip with lua-scripts

Adds on-screen buttons for the farming tools and seeds.