WowAce

Gives a score for your kit allowing easy comparison with others, also colour codes kit based on appropriateness for your level.

Shows a circle on the minimap to indicate spell range

Client for MagicDKP which handles standby calls and bidding on items.

Utility library with shared functions and data for various addons by NeoTron.

DHUD2

Swiss Army knife for instances, including player tracking, ignore buttons, loot tracking, notes, and more.

Database of important locations for HandyNotes

Library supporting plug in filters.

XArt

Cartographer_ExtractGas

A frame designed for each specialization of druid's watching their main power and important buffs/debuffs

Adds your name to chat messages

Quest helping: fetching items to use, that sort of thing.

OneView

PoisonMenu

Provides the ability to suppress specific spellcasts like "Deaden" from your casting bars.

Tailoring data for Ackis Recipe List.

aX_RaidStatus

Splut

Allows you to create icons, which can be customized greatly by user's input. CiR is more than just the usual cooldown tracker.