WowAce

Gears skins for Masque.

A blizzard group finder replacement

Achievements

In-game theorycraft. Calculates actual damage/healing based on gear, talents and buffs.

Bulk mail reception made really easy

A library to determine estimated range.

Provides access to all Portal and Teleport spells on right click of one button.

Simple and super light-weight tracking of profession links for all your alts.

Bulk mail sending made really easy

Auto repair + shows durability.

A fancy LDB reputation display, show faction reputation and reputation change history

Addon to manipulate the map

Timers for Buffs, DOTs, CC effects, etc..

Libra

Marks the locations of Hallow's End candy buckets on the worldmap and minimap.

Lightweight Chat Improvements

One large inventory.

LibItemInfo-1.0

Collectinator is an addon which will scan your pets and mounts and provide information on how to obtain them.

Library that tracks incoming heals