Underwater Relics includes nine tile-able shader/texture presets: three wood, three metal and three stone.
Includes diffuse, bump and displacement maps. All are 1200x1200.

These shaders also work above sea level as moss in extremely wet, tropical or forest environments.

Also, if you're feeling bold there are three separate material presets for extreme displacement.
These work best on organic shapes.

Info Url:

 http://www.daz3d.com/underwater-relics-shaders