Game Graphics
These arent mods, they are graphic files that can be used to overwrite the default game images. You can also find game graphics in many of the compilation packages available. If you download a UI compilation and there are extra folders inside the Interface folder along with the Addons folder those will be graphics files.
AI-Art (3.3)
Created by Quokka(Camma), very nice graphics for many of the game frames. These look like a little different variation on the original Camma Graphics I posted below.
WoWInterface, Additional Mods
BlueButtons
This is not an AddOn, but a skin for the dialog buttons in game. It skins the red buttons to be blue like the login screen. Works for all interface options menus, micro menu windows and anything else that uses the default Blizz buttons.
WoWInterface
Camma's Graphics
Camma created very nice graphics for many of the game frames. The graphics are included as part of the Elegance UI compilation. Many of the graphics are the same as his AI-Art package above, but some are different.
Ferous Media
A collection of Textures made from scratch. Alot of it is inspired by alot of Authors, including Delsim, Ishtara, Duke, Halcyone, Dawn, and pHishr for the idea! If I fail to mention your name, please inform me and I will add it!
Modular Texture Packages
Textures to use with mods like KGPanels.
Neutrino Modular Texture Package
Red Alert Modular Texture Package
STeam Pixel Modular Texture Package
pHishr's Media Pack
A collection of my buttonskins, statusbars and borders.
WoWInterface
rUF
Reworked .blps to get a black border on Blizz_UFs.
WoWInterface
SharedMedia
Inserts media(textures, bars, borders, etc) into LibSharedMedia's storage. They can then be selected by any addon that supports LibSharedMedia, a lot of them do.
Curse
SharedMedia-Blizzard
Dajova
Shared Media
Grizzly Shared Media
Ohi's Texture pack for Shared Media
Shiningmind's Artwork Pack
A compilation of artwork for KGPanels.
WoWInterface