WowAce

Campaign maps for Warcraft Conquest Moon Guard server

Adds various hearthing items to AdiBags virtual groups

A library that handles the basics of "window" style frames

CT_RaidAssist style raid frames

Target Debuff monitor. Stacking aware, giving current and potential debuff status.

The Talent Template Editor

Database of Mailbox locations for HandyNotes

Plugs classical world style fonts into LibSharedMedia-3.0

ArcHUD2

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

Assessment

Tracks, transmits and displays the cooldowns of your raid.

SRA

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

A UI for searching the guild roster.

Tells you if you're buffed

Displays information about the current zone on the World Map

Displays item durability and repair cost.

Good old LibTourist-3.0 for WoW Classic Era

Provides database of quest giving npcs/mobs/objects for display on the World Map/Minimap