WowAce

Additional information about player spells.

A powerful, comprehensive utilty for displaying graphics and information based on buffs, debuffs, and other triggers.

Test whether the player can really dispell a buff or debuff, given its talents.

Modular casting bar.

Afflictions display and cleaning for solo, group and raid with advanced filtering and priority system.

A skinning engine for button-based add-ons.

Caith skin for Masque.

Serenity skins for Masque.

Apathy skin for Masque.

Entropy skins for Masque.

Cirque Skins for Masque

EBB adds groups of bars to your screen showing you which (de)buffs currently affect your toon or some other units.

LiteStep skins for Masque.

Gears skins for Masque.

Show buffs on nameplates.

Display auras on action buttons.

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

Textures for Stop Motion

Tracks the Blood Shield for Death Knights.

Attach diminishing return icons to unit frames.