WowAce

DrumCoord

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

Colors friends/bg score board/who list names by class color

Spell interrupt aid and announcement addon.

Tankadin

fixes the issue with InterfaceOptionsFrame_OpenToCategory not actually opening the Category (and not even scrolling to it)

Adds usable and equipable filters to Baggins

LittleBlackBook

Simple minimap tracking display with tracking selection in its tooltip.

Display fails based on EnsidiaFails filtering options in Skada

End of combat reporting for feedback on how your cast time was spent or wasted.

Simplistic addon to load Talented on demand

Makes most default frames movable (mailbox, achievements window etc.)

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

Broker_CalendarEvents

PvP plugin for any DataBroker display.

Check for unenchanted and ungemmed items

Hold a key to temporarily center and magnify the Minimap.

A collection management library similar to .NET's System.Linq

RepWatch