WowAce

Adds filtering based on your known professions.

Clock plugin for any DataBroker display.

Shows on the minimap where to fetch Finklestein's reagents

Automatic switching to FFA loot for Mimiron phase 3

A database of poeple wo can craft your items

QuestLongList

ManaMeter2

Tracks and reports party rolls

Blocks all whispers except from people in your guild and friends list.

With Mists of Pandaria Blizzard publish all characters from an account unless you disable that 'feature'. This addon warns you.

Adds tooltip for debuffs (and other things? you found out: no).

Nostalgia

Cartographer_Data

Tracksw

FailBotSpam

BigWigs_Debugger

phLayoutLib

cyCircled_Vol

A lightweight datatext-plugin for Elvui that shows you all the relavant currencies for Legion.

Automatically calls ForecQuit() right before you are AFK-disconnected to quit wow instead of going to the character selection...