WowAce

An extension to the default WoW Unit Frames.

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

Makes a sound when your focus starts casting. Use with [target=focus] macros for interrupts (Counterspell, Spell Lock, Wind ...

LDB display of currencies, gold totals and session / daily / weekly statistics for all characters on a server.

Questing minion

Database of Diminishing return categories and general data

Switch macro depending on zones or BigWigs boss modules.

Proximo

Death analysis tool

Checks your gear before bosses and yells at you if you're an idiot

Shows ZoneInfo on the World Map in a perfectly cromulent fashion.

Where the lore is at

Textures for Stop Motion

Deathknight Rune Display

Track all threat redirection ability transfers and cooldowns (Misdirection and Tricks of the Trade).

Display Garrison missons for all Characters

Keeps track of your current location.

Friends list improvements: notes, remembering the information of offline friends, friend list syncing and backups, and a fuba...

Find five Ephemeral Crystals, get a pink hippogryph

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