WowAce

FuBar_CharmsFu

What did you just loot?

Fires events whenever a raid member "fails".

Timerbar embeddable library

Automatically leaves the global channels when inside an instance/raid and restores them when exited.

A library to handle rearrangement of blizzard's frames when bars are added to the sides of the screen.

Reforges stuff

Complain about crowd control breaks.

Automatically generate and announce optimal spirit totem assignments during the Gara'jal encounter in Mogu'shan Vaults.

Enables cooldown notification between players and allows party members access to each-others spell books.

Swiss Army knife for instances, including player tracking, ignore buttons, loot tracking, notes, and more.

Shows activity for hidden ChatFrames by making their tabs flash.

QuestAnnouncer

FuBar_PetInFu

xchar

Visual loot monitor

LDB data source displaying rested XP for whole account

Short EPEEN

quick quest turnin and acceptance with a shared keybind

Display the global cooldown around your cursor. (+ other stuff)