WowAce

Reduces interface tedium by doing the little things for you.

Automatically enables or disables combat logging based on location.

Incubator

FuBar_BattlegroundFu

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

ArcHUD2

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

Shows simple Buttons for your Cooldowns :)

Teleporters in Suramar? Sure, why not?

ItemSync the happy item gatherer and toolkit.

Shows you a much bigger icon selection frame

Babble-2.2

A library to help with localization of Zones.

QuestLog

A simple slash-command-based addon for querying item information from the Blizzard servers via ItemIDs and SpellIDs.

Visualises healing.

Prat

CraftList2

Show item durability and quality in the character frame.

Displays the remaing cooldown of the action you tried to use