WowAce

ImprovedRWF

Litmus

Monitors for friendly deaths and announces them as in Myth: The Fallen Lords

Automatically leaves the global channels when inside an instance/raid and restores them when exited.

LCDs for WoW

Heads-up minimap display

Adds party/raid role icons in useful places

Displays the zone level ranage of the zone you are in and also gives you a suggest zone and instances to be in.

Visual loot monitor

Cartographer_Routes

Incubator

StarVisuals displays various data visualizations

Sorts the Wardrobe

Simple library that handles multiple levels of logging.

Automagical macros for each talent tier.

Adds Outfitter set filters to AdiBags.

Fires events whenever a raid member "fails".

Show coordinates on minimap

Resizes some default UI frames (GuildUI, LootFrame, RaidInfo, TradeSkillUI and TrainerUI) to show more lines

TouristLib