WowAce

Adds options to create customized layouts from within grid.

ArenaMaster

Draws some lovely 3D portraits in the standard Blizzard artwork.

Square Minimap and more

Shared handling of media data (fonts, sounds, textures, ...) between addons.

Makes your item stats shine!

A library to help with localization of talent trees.

FuBar_DuraTek

Displays friend notes in unit tooltips, at logon, and in /who results.

T_ItemInfo

Quickly assign the highest follower to each building or unassign all of them.

tekKonfig

Gives a Smoother Quest Experience

JasonQuest

Prompts for canceling of pet battles if no rare pet is found in the opposing team.

Cartographer_Mining

Eliminates the spam from the chatframe and sums it up in a broker plugin.

Combine

OneBag is a replacement for the default game bags that combines all the bags into one frame.

CraftList