WowAce

Keeps track of quests.

An extension to the default WoW Unit Frames.

StatLogicLib

Show item durability and quality in the character frame.

A fancy LDB reputation display, show faction reputation and reputation change history

Quest History tracker and shows lists of quests in each category

Displays online guild mates.

Adirelle's unit frames, based on haste's oUF.

Automatically turns on the combat log for selected raid and mythic+ instances.

Automated smart raid marking to speed up trash clearing in instance runs

Unit frame addon using Ace3.

Displays the locations of the chests for the Treasure, Treasure Everywhere achievement

Auto repair + shows durability.

Tracks the HoTs you cast.

Antagonist

Adds various information based on PeriodicTable to item tooltips.

Displays the remaing cooldown of the action you tried to use

Switch macro depending on zones or BigWigs boss modules.

Keeps track of HoTs, DoTs, Buffs and Cooldowns. With audio and text alerts to refresh them.

Displays Instance Maps