WowAce

Adds various information based on PeriodicTable to item tooltips.

Tracks the HoTs you cast.

Collects Herbs, Mines, Gas Clouds and Fishing locations and adds them to the worldmap and minimap

Quest History tracker and shows lists of quests in each category

Bulk mail sending made really easy

Additional information about player spells.

A blizzard group finder replacement

Adds World Quests to the quest list

One large inventory.

Marks the locations of Midsummer Fire Festival bonfires on the worldmap and minimap.

Raid Frames using the oUF framework.

Violation

Antagonist

Provides access to all Portal and Teleport spells on right click of one button.

Bayi's Extended Questlog

Create panels for customizing your UI, sucessor to eePanels

mount and companion manager

XRS

Adirelle's unit frames, based on haste's oUF.

Cleans up minimap buttons and makes them accessible through a pop out menu!