Pattern Background, Texture, Photoshop Structure style CC0 texture.
Source Darkmoon1968
You could get a bit dizzy from this one, but it might come in handy.
Source Dertig Media
Submitted in a cream color, but you know how I like it.
Source Devin Holmes
Light gray paper pattern with small traces of fiber and some dust.
Source Atle Mo
Nice and simple crossed lines in dark gray tones.
Source Stefan Aleksić
Used in small doses, this could be a nice subtle pattern. Used on a large surface, it’s dirty!
Source Paul Reulat
Prismatic Snowflakes Pattern 2 No Background
Source GDJ
The original enhanced with one of Inkscapes's filters.
Source Firkin
Derived from a drawing in 'Elfrica. An historical romance of the twelfth century', Charlotte Boger, 1885
Source Firkin
Dark wooden pattern, given the subtle treatment. based on texture from Cloaks.
The base gradient edited so now more details are rendered.
Source Lazur URH
Remixed from a design found in 'History of the Virginia Company of London; with letters to and from the first Colony, never before printed', Edward Neill, 1869.
Source Firkin
Abstract Tiled Background Extended 12
Source GDJ
The name alone is awesome, but so is this sweet dark pattern.
Source Federica Pelzel
Nice and simple crossed lines in dark gray tones.
Source Stefan Aleksić
A free seamless texture of reptile skin colored in a dark brown color. As always, you may use it as a repeated background image in your web design works, or for any other purposes.
Source V. Hartikainen
Non-seamless pattern drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
A light background pattern with diagonal stripes. Here's a simple light striped background for you.
Source V. Hartikainen
You could get a bit dizzy from this one, but it might come in handy.
Source Dertig Media
A nice looking light gray background pattern with diagonal stripes.
Source V. Hartikainen
Turn your site into a dragon with this great scale pattern.
Source Alex Parker
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin