WowAce

manipulate the minimap in numerous ways; move, scale, skin.

Review any raid or party members recent incoming combat along with health level.

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

Mark My Words

Tracks the precise arrival & departure schedules of boats and Zeppelins around Azeroth and displays them on the Mini-Map and ...

FuBar_BattlegroundFu

Buffalo2

RaidSpy

Sphere

Tracks, transmits and displays the cooldowns of your raid.

Alchemy data for Ackis Recipe List.

CandyBar style cooldown display

Separate indicator for your HoTs with timer.

A library that handles the basics of "window" style frames

A library to get currencies' related information

TouristLib

Mutt (Macro Update Target Tool) provides slash-commands that can patch the predefined targets in your macros.

Threat-2.0

Provides shareable notes and other information for your guild, party and raid community.

A Library for stat conversion, calculation and summarization.