WowAce

Enhances the default AddOns list.

Food/water macro generator

Tells you if you're buffed

Show all the leyline taps in Suramar

Improved Questing Experience

Switch macro depending on zones or BigWigs boss modules.

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

Smart raid loot and DKP tracker with automated standby and learning

Try on different gear and see their total stats and their differences. In short, an ingame CT-Profiles-like addon.

A replacement tradeskill window for Classic

Manages social information with a focus on main-alt associations.

Death analysis tool

Allows the user to preview and track their progress in the collection of various transmogrification appearance sets

Bind spells, items, and macros to keys, without using action buttons

Shows you a much bigger icon selection frame

A Friend-Enemy-Unit-Frame for battlegrounds.

Show what quests have changed

Shaman totem bar

Show all the orbs for triggering Kosumoth

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