WowAce

Shows a frame to track your Pyrite debuff on Flame Leviathan and it's trash. Completely based on MalygosStacks by Nebula.

Creates a broker plugin for all your broker launchers

Notifies you of new calendar event invites and reminds of upcoming events on all characters and realms

Automatically sells low quality gray items to the vendor.

Action button layout and configuration

Improved Guild Control Panel

Helps you keep track of your experience.

This addon helps with daily quests.

Pet feeder, called by "/click FeedItButton" from a macro.

oUF_HolySmurf

Adds pipes which can control arbitary other statuses (like toggle status on key or "in combat"-state).

Langoustine

BigWigs_RazuviousAssistant

Out of Mana bar.

Intended to be a complete guild management tool suite)

Adds achievement reminders to BigWigs

ViewAddonMessage

QuoteNoMore

Interface for addons to include extra information on the GuildMemberInfo frame.

BigWigs_HealbotAssist