WowAce

Displays the zone level ranage of the zone you are in and also gives you a suggest zone and instances to be in.

FuBar_uGuild

RaidAgent

Provides a quick display for the LFG Call to Arms

Adds Scrolling Combat Text above your character

Resizes some default UI frames (GuildUI, LootFrame, RaidInfo, TradeSkillUI and TrainerUI) to show more lines

LDB data source for herb, ore and skinning node data

Shows class colors on player nameplates and names

Rep2 displays a message, which shows how much reputation you gained, and how much is needed until the next standing.

FuBar_ExperienceFu

Cartographer_Routes

Adds World Quests to the quest list

Bidder for DKP points. Usable as standalone bidder, or with DKP - Manager to manage points.

Short EPEEN

A UI for searching the guild roster.

Warnings about tanking specific abilities

Quixote

Blacksmithing data for Ackis Recipe List.

ImprovedTargetFrame

opens/closes all bags when at merchant (instead of only the backpack)