WowAce

Keeps track of time played and rested XP across your characters.

Threat reactive nameplates for TidyPlates.

Target Debuff monitor. Stacking aware, giving current and potential debuff status.

NameTagToggle

Nudge

Tells you the Tiller, what food they like, and if you have fed them today for the quests A Dish for ...

BA3_SpellAbilities

lern2count adds ABinfo castcounts to spell and actions. It has a builtin reagentcount too.

lugMD

RBM

Scans your Equipment for cumulative item bonuses and sums them up.

Raid loot tracking and text generation

FuBar_PoisonReminderFu

Database of Trainer locations for HandyNotes

BeneCast 10

Provides data about all artifacts in the player's possession.

Nihilum Raid Tracker, originally written for the EU guild Nihilum.

Broker plugin to display player orientation

Add-on that shows which mounts can be farmed this week

Addon to provide a much nicer map