WowAce

Highly-configurable shield / absorb tracker.

Used to visualize and change values of variables/variable-trees in game

Calculates DKP based on Item Level

Replacement for default bags.

FuBar_tTracker

A customizable view of friends and guildmates.

T_ItemInfo

FuBar_PetInFu

Visual loot monitor

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

QuestAnnouncer

Historian

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

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

Prints a message in your default chat frame when someone in your group gains an aura.

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

Assister

FuBar_ShardCountFu

Provides quick notification (sound and visual) of your tanking status of your current target. Meant for tanking.

quick quest turnin and acceptance with a shared keybind