WowAce

Shows a countdown bar for the duration of auras (e.g. HoTs, DoTs)

EnvenomX

Bag and item management utilities

Displays a variety of useful stats for tanking

Replacement for the default nameplates.

Allows frames to be dragged around, without permanently changing their position.

Forces LSM and LibSink to use specific textures and sinks.

Hunter pet manager for any DataBroker(LDB) display.

Adds tier set number and difficulty indicators to tier item tooltips.

Provides access to all teleporting spells and items on right click of minimap button.

Reputation tweaking module for TweakHub with auto watched faction selection and detailed rep info updates.

Party Ability Bars

NextStep

ComboSounds

aX_RaidStatusConfig

CleanShot

ViewAddonMessage

Shows the number of battle resurrections you have and when the next one will become available during a boss encounter.

PiraPlex

A library that tells wether a item is a quest item or not (equipped or in bags)