WowAce

Shows a circle on the minimap to indicate spell range

Square Minimap and more

Numen

PriceTag

Helps you automate selling stuff.

Adds Scrolling Combat Text above your character

DarkCandy

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

Estimated time until current target will die.

Sniff

DeuceCommander

Leatherworking data for Ackis Recipe List.

Mapster's Minimap brother

Volume control panel.

Assister

SliceWatcher

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

A Library for stat conversion, calculation and summarization.

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

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