WowAce

Gears skins for Masque.

Display aura information inside action buttons

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

Keeps track of HoTs, DoTs, Buffs and Cooldowns. With audio and text alerts to refresh them.

A collection of Rogue modules.

Tracks the HoTs you cast.

Show buffs on nameplates.

CT_RaidAssist style raid frames

Reports in raid chat whenever a raid member "fails." /EnsidiaFails to configure.

Shows you the radius of your totems.

Checks your gear before bosses and yells at you if you're an idiot

Compact & customizable filtering, monitoring and grouping of buffs and debuffs

Modular and lightweight party/raid frames.

Tracks, transmits and displays the cooldowns of your raid.

Textures for Stop Motion

Tells you if you're buffed

Attach diminishing return icons to unit frames.

Personal buff monitor - are you buff enough?

Tracks the Blood Shield for Death Knights.

A small checklist for raid (de)buffs and who brings what.