WowAce

Adds an inobtrusive circular castbar around the mousecursor, handy for Clique users

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

Customizeable UI to display the values tracked by AbsorbsMonitor

Provides data about all artifacts in the player's possession.

Tools to easily compare gear among party members.

Manasurge

Encodes and Decodes between Lua tables and JSON/CSV.

Reports in raid chat whenever a raid member "fails." /EnsidiaFailsWotLK to configure.

Enigma

FuBar_SpeedFu

AvionComicMedia

Inventory Management

Provides accurate, millisecond-level timing.

Display fails based on EnsidiaFails filtering options in Skada

Tracksw

Broker_CalendarEvents

"Your quest log is full". How many quests do you have in your log?

Gugagaia_dk_addon will be like a teacher, helping the player that have a character of Death Knight class

Unsolicited

Monitors the combatlog identifying players from the oposite faction near you.