WowAce

AutoMagicly clicks though Daily Quests, and Turns them In.

Combine

Disease Tracker for Death Knights.

FuBar_FarmerFu

Fade Blizzard Raid Frames

Powerleveling guide framework

Makes those pesky garrison animations go away.

Library supporting plug in filters.

GonffBar

Control screenshot format and quality via LDB displays

A customizable casting bar replacement for TBC Classic & Classic WoW

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

Check the consumable usage of your raid

eeShards

Cartographer_nnTrainers

Rewrite myBindings. An enhanced key bindings interface.

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

Various libraries based on LCD4Linux, offering users lower-level UI customizations.

Library to help with querying unit talents.

This will keep track of how much you have paid per item in your inventory. Only one of (Auctionator, Auctioneer, AuctionLite,...