WowAce

Additional information about player spells.

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

Modular casting bar.

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

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

A skinning engine for button-based add-ons.

Tracks the Blood Shield for Death Knights.

Caith skin for Masque.

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

Smooth combat HUD based on ArcHUD2

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

Show buffs on nameplates.

Display auras on action buttons.

Entropy skins for Masque.

Apathy skin for Masque.

Textures for Stop Motion

Serenity skins for Masque.

Onyx skins for Masque.

Attach diminishing return icons to unit frames.

LiteStep skins for Masque.