WowAce

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

Achievements

Cirque Skins for Masque

A fancy LDB reputation display, show faction reputation and reputation change history

A Friend-Enemy-Unit-Frame for battlegrounds.

Entropy skins for Masque.

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

Addon to manipulate the map

Onyx skins for Masque.

Lightweight Chat Improvements

Data Broker Display similar to FuBar

Shows you a much bigger icon selection frame

Smooth combat HUD based on ArcHUD2

Database sharing module for GatherMate2

Floating Combat Text of awesomeness. Caw. It'll eat your crackers.

Database of Diminishing return categories and general data

Track time played, rested XP and money for all characters

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

Timers for Buffs, DOTs, CC effects, etc..

Collectinator is an addon which will scan your pets and mounts and provide information on how to obtain them.