WowAce

Shared handling of alternate identity data between addons.

Save and send chat messages to many channels. Allows quick item and profession linking within your messages.

A UI for searching the guild roster.

Keeps account of attendance and loot for raids, parties, bgs, arenas and solo for questing.

In-game EPGP guild helper, supports standby, main/alt shared pools, minEP, offpecGP. Fixed price list with progress multiplier.

View an image of your guild vault from anywhere.

YssGuildShop

Displays online guild mates.

Angry Raid Points

A FuBar plugin for Converge Guild Officers.

Friends & Guild Data Broker plugin.

Tracking and ranking of dps/hps in a guild.

Searches bags/banks of all your characters/guilds.

Raid loot tracking and text generation

Nihilum Raid Tracker, originally written for the EU guild Nihilum.

Need Greed window for EPGP lootdistribution.

Does stuff for sachmo

DKP system for all guilds in the Banana Republic.

A collection of useful (guild management) tools and utilities for smarter than average bears.

Provides shareable notes and other information for your guild, party and raid community.