WowAce

Compression and Decompression library

Grabs bugs for the bug sack.

Toss those bugs inna sack.

Simple AceGUI3 dropdown item classes for font/statusbar/sound/etc.

Does stuff for sachmo

A library to help with localization of in-game subzone names.

Provides one or many frames for dumping text into.

Library providing mappings between trade skill recipes, spells and created items

OneCore is the centralized code shared between the OneBag Suite

Show what quests have changed

Mutt (Macro Update Target Tool) provides slash-commands that can patch the predefined targets in your macros.

Tracks SendAddonMessage Spam

Parses ToC and adds About panel to Interface options

Ironi's Encounter Event Tracker

Creates simple table controls for tabular text data.

A simple slash-command-based addon for querying item information from the Blizzard servers via ItemIDs and SpellIDs.

PT3Browser

A library to help with localization of Archeology dig sites

SysMon plugin for any DataBroker display.

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