Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin
Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
A free seamless background image with a texture of dark red "canvas". It should look very nice on web sites.
Source V. Hartikainen
Simple combination of stripy squares with their negatively coloured counterparts
Source Firkin
This light background pattern has a texture of "frozen" surface with diagonal stripes. Here's an yet another addition to the collection of free website backgrounds.
Source V. Hartikainen
A seamless pattern with wide vertical stripes colored in pale yellow.
Source V. Hartikainen
It’s a hole, in a pattern. On your website. Dig it!
Source Josh Green
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Looks like an old wall. I guess that’s it then?
Source Viahorizon
A lovely light gray pattern with stripes and a dash of noise.
Source V. Hartikainen
Bumps, highlight and shadows – all good things.
Source Badhon Ebrahim