WowAce

Allows customisation of login/logout system messages.

ActionCombat

InstanceMaps

Surfaces

Tracks SendAddonMessage Spam

MonkeyPirate

GearRating

A tool to appraise, estimate, or judge your equipment against the equipment of others.

Notifies you of experience gains

Allows you to create icons, which can be customized greatly by user's input. CiR is more than just the usual cooldown tracker.

ElfReloaded

Keeps track of resurrection spells cast in a group

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

Adds a button to your character and inspect window that shows a summary of gear enchants and gems.

Manager for DKP points. Requires DKP - Bidder as main Graphic User Interface.

ItemEnchantApplication

StatStain

VisualThemes

Shows the minimum durability of equipped items on the stats frame.

Automagical macros for each talent tier.