WowAce

Toggles WoW to the forground on events.

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

eeShards

Automatically and immediately cancels all in-game cinematics and movies

Display an informational fighter jet style HUD while flying or riding

OneBag

Simple quest item bar.

A library to get currencies' related information

Announces interrupts in the chat

MiniPet, Always keep your little companion with you, based on the work of Carra.

Embeddable chat throttling library with traffic shaping and priorities

Displays friend notes in unit tooltips, at logon, and in /who results.

FuBar_DuraTek

New/Old BG indicator, Join by ID, Quick Leave Queue, etc.

Raid Frames using the oUF framework.

Makes the Blizzard options frame movable and resizable

Provides information of tradeskill and crafting materials that are in the banks and bags of your characters.

Adds a button to the quest completion interface which allows you to auto equips selected quest Item after completion

Threat-2.0

Adds achievement reminders to BigWigs