WowAce

Translates the received text icons {cross}, {skull} etc in your local language for multilingual raids

Tracks Prayer of Mending

Compliments the colourblind mode "shader" options by making them accessible from the Interface menu.

Adds statuses to grid for best targets for smart heals.

Additional Action Bar Buttons

FriendlyArrow

Jude

HuntersMark

Automatically buy grocery bags for items you have enough of.

Will try to keep track of what a character did last time it was logged in

Addon to manage WoW titles.

RuinBossTactics_SSC

A datatext for currencies that is highly costumizable, Includes a tooltip for hidden currencies

RBM_Hyjal

Satcheler, simple LFD satchel detection and queuing

Bring back the Raid Finder queue Bosses Defeated text in 5.1

Adds Weapon Buff status to Grid2.

ShadowedUnitFrames_SmoothBars

GBS tricks other addons into thinking a guild bank is your personal bank.

A library to define schemas for Lua types and validate Lua values against those schemas.