WowAce

Battleground Timers in a HUD around the Blizzard BG status

Ironi's Encounter Event Tracker

Shows a nice Soulstone Monitor.

Filters AFK and DND messages after you've seen them once.

KC_Items

Complain about crowd control breaks.

Raid Cooldowns

Combat Alert

Combination of Titan LootType and Roll - stripped down and cleaned up.

Library supporting plug in filters.

Makes your item stats shine!

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

Displays the locations of the chests for the Treasure, Treasure Everywhere achievement

Configuration for LibToast notifications.

AutoFIR

FuBar_HonorFu

Displays the locations of Garrison music scrolls.

Shows skills in a tooltip and allow them to be used. Also keeps track of Cooldowns.

FuBar_TrainerFu

Shows your standings with the factions.