Very dark pattern with some noise and 45-degree lines.
Source Stefan Aleksić
A simple but elegant classic. Every collection needs one of these.
Source Christopher Burton
Love the style on this one, very fresh. Diagonal diamond pattern. Get it?
Source INS
No, not the band but the pattern. Simple squares in gray tones, of course.
Source Atle Mo
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868.
Source Firkin
This background pattern contains a texture of yellow wood planks. I think it looks quite original.
Source V. Hartikainen
The image depicts a seamless pattern made using a bird's face.
Source Yamachem
Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
This background pattern looks like bamboo to me. Feel free to download it for your website (for your blog perhaps?).
Source V. Hartikainen
This background texture resembles stone. It may be used as a background on web pages or on some of their html elements (header, borders, menu bar, etc.). Just modify it for your needs.
Source V. Hartikainen
A bit of scratched up grayness. Always good.
Source Dmitry
From a drawing in 'Worsborough; its historical associations and rural attractions', Joseph Wilkinson, 1879.
Source Firkin
Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Prismatic Abstract Line Art Pattern Background
Source GDJ
Just the symbols of the signs of the zodiac distributed in a chequer board-like pattern
Source Firkin