WowAce

Displays reagent count on spell action buttons

Hunter 'Misdirection' activity and cooldown monitoring for raids/groups. 'Readiness' aware.

Aura alarm.

Track of your tradeskills across characters, create small buttons for them and track cooldowns.

Accelerates Camera Zooming

Library supporting plug in filters.

A 'channeling spell'-tracking addon for Affliction Warlocks. Drain Soul, Drain Life/Harvest Life and Malefic Grasp.

Don't underestimate your little critters!

GUI Configuration Library

Provides the the health and target of by an unit targeted mob (meant to be used for tanks).

FuBar_ExitFu

For Developers (of Addons which uses LibWho-2.0): show queues and queries in realtime

Quickly assign the highest follower to each building or unassign all of them.

Test whether the player can really dispell a buff or debuff, given its talents.

Adds aggro coloring to oUF.

Simple font replacement

Enables the filtering of items when you visit a vendor

Adds the toon name to the alert that your RealID friend has come online.

ItemPriceTooltip

Provides a LibDataBroker plugin for quick access to professions under Ackis Recipe List.