This background pattern looks like bamboo to me. Feel free to download it for your website (for your blog perhaps?).
Source V. Hartikainen
From a drawing in 'La Principauté de Liège et les Pays-Bas au XVIe siècle', Société des Bibliophiles Liégeois ,1887.
Source Firkin
A seamless web texture of "green stone".
Source V. Hartikainen
A dark one with geometric shapes and dotted lines.
Source Mohawk Studios
Lovely pattern with some good-looking non-random noise lines.
Source Zucx
You were craving more leather, so I whipped this up by scanning a leather jacket.
Source Atle Mo
A comeback for you: the popular Escheresque, now in black.
Source Patten
This was submitted in a beige color, hence the name. Now it’s a gray paper pattern.
Source Konstantin Ivanov
A background formed from an image of an old tile on the New York Metropolitan Museum of Art website. To get the base tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
8 by 8 pixels, and just what the title says.
Source pixilated
An emulated “transparent” background pattern, like that of all kinds of computer graphics software.
Source AdamStanislav
These dots are already worn for you, so you don’t have to.
Source Matt McDaniel
Imagine you zoomed in 1000X on some fabric. But then it turned out to be a skeleton!
Source Angelica
White circles connecting on a light gray background.
Source Mark Collins
I guess this is inspired by the city of Ravenna in Italy and its stone walls.
Source Sentel
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
This is lovely, just the right amount of subtle noise, lines and textures.
Source Richard Tabor
This one is super crisp at 2X. Lined paper with some dust and scratches.
Source HQvectors
More bright luxury. This is a bit larger than fancy deboss, and with a bit more noise.
Source Viszt Péter
Colour version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso