WowAce

Debuff Monitor: A Powerful & Configurable Raiding Tool

Adds unreal tournament style sounds to PvP encounters.

Reputation tweaking module for TweakHub with auto watched faction selection and detailed rep info updates.

FuBar_MiniPerfsFu

Dropin replacement library for SetBackDrop

Converts incoming ALL CAPS CHAT into lowercase text.

Show an in combat indicator

Checklist and notes addon.

MoBuffs

Facilitate better communication for loot councils

Constructs a SimC export string for an item without equipping it

Displays a reliable cooldown timer for the Shaman Ascendance ability

JostleLib

Simple, light-weight, LDB-enabled timer that tracks how long you spend in combat

Displays a variety of useful stats for tanking

Tracks and announces interrupts (eg. Hit/Miss/Immune) and is also able to track and report "wasted" interrupts (those which d...

Adds icons to the configuration menu for all standard Grid indicators.

T_Tracking

Shows you which bosses you've killed next to the raid finder frame.

Shows loot information in item tooltips