This is a developer tool which allows you to browse all textures within WoW's interface.
You can shift click on a texture entry to paste the path into the chat box, and then copy it from there to insert into your code.
To open, use slash command
- As of patch 4.0.1a, a total of 6233 icons can be viewed using this tool.
- As of patch 4.0.3a, a total of 7949 icons can be viewed using this tool.