WowAce

ItemEnchantApplication

lern2count adds ABinfo castcounts to spell and actions. It has a builtin reagentcount too.

aX_RaidStatus

Save and load macros.

GemList

Complain about crowd control breaks.

Simple, nice-looking power bar addon for all classes.

A library to handle rearrangement of blizzard's frames when bars are added to the sides of the screen.

Open those clams (and other containers)

FuBar_FarmerFu

Embeddable chat throttling library with traffic shaping and priorities

A library to return spell duration and debuff type of a spellID.

Instant PROC notification

Add in keybindings to place raid marks on mouseover, or the target if there is no unit being moused over

Libary for cleanly inspecting other players

LDB data source displaying rested XP for whole account

Calculates DKP based on Item Level

Makes the message dialog movable

Broker launcher that switches specializations when clicked. Also hides spell learned spam.

Warns you with sounds when you gain different shaman spells.