WowAce

Compression and Decompression library

Grabs bugs for the bug sack.

Toss those bugs inna sack.

Parses ToC and adds About panel to Interface options

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.

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

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

PT3Browser

Tracks SendAddonMessage Spam

Show what quests have changed

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

Expo

Creates simple table controls for tabular text data.

OneCore is the centralized code shared between the OneBag Suite

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

tekSupport

SysMon plugin for any DataBroker display.