WowAce

Assessment

Create panels for customizing your UI, sucessor to eePanels

Configurable Castbars

AutoMagicly clicks though Daily Quests, and Turns them In.

Bayi's Extended Questlog

Marks the locations of Hallow's End candy buckets on the worldmap and minimap.

Target Debuff monitor. Stacking aware, giving current and potential debuff status.

An extension to the default WoW Unit Frames.

Show item durability and quality in the character frame.

Good old LibTourist-3.0 for WoW Classic Mists of Pandaria

A collection of Rogue modules.

Keeps track of quests.

Adds mob patrol paths to your map.

Violation

Try on different gear and see their total stats and their differences. In short, an ingame CT-Profiles-like addon.

Displays information about the current zone on the World Map, for WoW TBC Classic

Display aura information inside action buttons

Switch macro depending on zones or BigWigs boss modules.

Display auras on action buttons.

A blizzard group finder replacement