WowAce

Allows custom-triggered boss mod timers to be created

View party member quest logs

Quickly builds /target macros for immediate use.

SinkLib

FuBar_RLAssistFu

Displays a reliable cooldown timer for the Shaman Ascendance ability

Shows a frame to track your debuff on Malygos in phase three.

Displays the time until the next battle and more.

Mob respawn timers

Checklist and notes addon.

Display an arrow that points to a raid/party member anchored to raid frames

IDCard

Keeps tracks of /rolls.

Holy Power, Shadow Orbs, Rogue Combo Points and Monk Chi.

Plays amusing sounds whenever you skin a mob

DotDotDot

Broker_CalendarEvents

PiraPlex

Shared handling of media data (fonts, sounds, textures, ...) between addons.

Compact scrolling vendor frame