WowAce

Simple, light-weight, LDB-enabled timer that tracks how long you spend in combat

MessageEvent

Automatically converts a party to a raid when you attempt to zone into a raid zone without a raid.

pMutilate

Add lines to ore and gem tooltips that show prospecting sources/results.

FuBar_AbramsFu

Allows combined aura detection. motw + gotw, all 4 mage int buffs, etc. in one status.

Resizes Blizzard raid frames, and adds additional options.

T_RPP

Sneakily inspect how much gold your mouseover target has made so far.

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

FruityLoots

Small addon to copy chat lines.

Damnation

Adds achievement reminders to BigWigs

DebuffEnough

Frame layout manager for side panels.

Suppress chat messages when specified items are looted

Never forget which one in that 5-mob pull casts what spell again.

Library to provide visual bar creation and management.