Texture Library
This page is a repository of textures that anyone can use for any purpose. I'm putting them all in the public domain, so I don't care what you do with them. There is very little here for now, but someday I will get around to adding additional textures that people may find useful.
Simple Textures
GreenShipTexture.png- This is simply an extra texture for the SimpleShip model, over in the 3D Model Library.
Sky Boxes
The sky boxes below are in the .dds format, which is probably what you want for an XNA game.
Download: SkyBox.zip
Download: Islands.zip
Download: Sunset.zip
Download: EmptySpace.zip
Download: SunInSpace.zip