WowAce

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

EBB adds groups of bars to your screen showing you which (de)buffs currently affect your toon or some other units.

Tracks vulnerability debuffs on multiple mobs

Bayi's Extended Questlog

Adds countdown voices from the heroes in Overwatch to BigWigs.

Shared handling of alternate identity data between addons.

Incubator

tracks and share quests between your party

Provides one or many frames for dumping text into.

Display aura information inside action buttons

Keeps track of quests.

Questing minion

Reports in raid chat whenever a raid member "fails." /EnsidiaFails to configure.

A simple combat log that displays events similar to SCT

DKP system for all guilds in the Banana Republic.

Show buffs on nameplates.

Caith skin for Masque.

Adds a status to Grid for debuffs applied by Raid Bosses.

Co-ordinated targetless Party and Raid wipe recovery. Evolved

A blizzard group finder replacement