WowAce

Good old LibTourist-3.0 for WoW Classic Mists of Pandaria

Displays information about the current zone on the World Map, for WoW TBC Classic

mount and companion manager

Quest History tracker and shows lists of quests in each category

Compact rune and proc display for Death Knights.

Kiwi Plates

XP bar using Ace3.

Lightweight but powerful auction house interface

HideTalkingHead

Enhances the default AddOns list.

Checks Raid Buffs/Flasks/Consumables. Tunable alerts for misdirects, taunts, cc breakage, rez, dispel and interrupt

A blizzard group finder replacement

Configure triggers to send messages to your raid team such as timers, rotations, and health/power based triggers. Raid smarter not harder.

Show all the leyline taps in Suramar

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

Create panels for customizing your UI, sucessor to eePanels

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

Show item durability and quality in the character frame.

Improved Questing Experience

Floating Combat Text of awesomeness. Caw. It'll eat your crackers.