Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
Alternative colour scheme for the original floral pattern.
Source Firkin
Same as Silver Scales, but in black. Turn your site into a dragon with this great scale pattern.
Source Alex Parker
More in the paper realm, this time with fibers.
Source Jorge Fuentes
Luxurious looking pattern (for a T-shirt maybe?) with a hint of green.
Source Simon Meek
The Grid. A digital frontier. I tried to picture clusters of information as they traveled through the computer.
Source Haris Šumić
Dead simple but beautiful horizontal line pattern.
Source Fabian Schultz
A seamless background colored in pale orange. It has a paper like texture with diagonal grid pattern.
Source V. Hartikainen
Pattern Background, Texture, Photoshop Structure style CC0 texture.
Source Darkmoon1968
This one resembles a black concrete wall when is tiled. It should look great, at least with dark website themes.
Source V. Hartikainen
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Bit of a strange name on this one, but still nice. Tiny gray square things.
Source Carlos Valdez