WowAce

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

OneBag is a replacement for the default game bags that combines all the bags into one frame.

Plugs classical world style fonts into LibSharedMedia-3.0

Show buffs on nameplates.

Database of Diminishing return categories and general data

Point to quest POIs on your minimap

Makes a sound when your focus starts casting. Use with [target=focus] macros for interrupts (Counterspell, Spell Lock, Wind ...

One large inventory.

Track time played, rested XP and money for all characters

Calculates and shows your TankPoints in the PaperDall Frame.

Quest History tracker and shows lists of quests in each category

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

Textures for Stop Motion

Simple and super light-weight tracking of profession links for all your alts.

Prat

Automated smart raid marking to speed up trash clearing in instance runs

Unit Frames of awesomeness. Woof. It'll bite your face off.

Good old LibTourist-3.0 for WoW Classic Mists of Pandaria

All in one buffing mod for all classes. Paladin buff generated assignments based on Paladin capabilities and raid member sub-...

Adds a status to Grid for debuffs applied by Raid Bosses.