WowAce

Provides data about all artifacts in the player's possession.

Gives detailed descriptions of particular localities, as zones or instances, and provides optional TomTom integration.

A Data Broker display for combat statistics.

Mapster's Minimap brother

Helps you automate selling stuff

Enables user defined sounds for Party, Guild, Raid and Custom Channel chat messages.

Give logical progression of Mining, Herbalism & Skinning. Will not be updated with WoD zones

Libary for cleanly inspecting other players

SRA

Fires events whenever a raid member "fails".

EQCompare

Helps you automate selling stuff.

A library for PvP and Battlegrounds

BuffMe

Scans your Equipment for cumulative item bonuses and sums them up.

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

Captures chatframe Tradeskill Links for later reference in an easy to read format

Client for MagicDKP which handles standby calls and bidding on items.

SpyGnome

FuBar_WhisperFu