WowAce

Syncs your friend list

Tells you which nest to fly to

allows you to flip cards of omens by spinning your mouse wheel; counts cards opened and money earned per session and lifetime

Vibrant

GridStatusHealPriority

Contains map data and functions to convert continent coordinates to minimap texture tiles.

Notepad for Lua scripts and mini-addons.

FriendlyArrow

A standalone (using the stopwatch) or plug-in for DBM which displays the duration of interrupts on incoming or outgoing spell-tree lockouts.

Checks the details of the inspected player's gear for mistakes and questionable decisions

AutoCombatLog

What actual item level is an item? Yes, it's horrible we need a library for this.

Kollektiv Unit Frames

Simple minimap tracking display with tracking selection in its tooltip.

ManufacSnoop

Mark the whelps in the Sinestra encounter

Makes raid rolls easier!

CallToArms

OneHitWonder

Allows the user to browse tables in a GUI