WowAce

Shows where the equipment of inspected users or yourself is from.

A system config addon to WOW

Shows the spec of people around you in the tooltip.

Creates a broker plugin for all your broker launchers

Calculates the relative value of attributes towards physical dps.

Really very early stage. No, earlier than that.

Add-on that shows in a unit tooltip window a number of killed mobs of the same kind

Item link modification

"Your quest log is full". How many quests do you have in your log?

Tools to easily compare gear among party members.

Shift-clicking on a user name in chat shows a tooltip with their whois information.

Pre-Alpha of SpiderEyes power desplay. Do not distribute!!

Very very simple tooltip

Shows what stat was reforged in item tooltips.

Adds tooltip for debuffs (and other things? you found out: no).

Enables RatingBuster to calculate selected buff effects even if you don't really have them

Shows the Guild Achievements Points and Members in the tooltip

Provides info about spell teaching items.

Adds an icon to item, spell, and achievement links

Tooltip text modiffier based on DogTag.