A seamless dark leather-like background texture with diagonal lines that look like stitches.
Source V. Hartikainen
A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin
A seamless texture of worn out "cardboard".
Source V. Hartikainen
A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
This one could be the shirt of a golf player. Angled lines in different thicknesses.
Source Olivier Pineda
Light gray paper pattern with small traces of fiber and some dust.
Source Atle Mo
Light square grid pattern, great for a “DIY projects” sort of website, maybe?
Source Rafael Almeida
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
One of the few full-color patterns here, but this one was just too good to pass up.
Source Alexey Usoltsev
Very dark pattern with some noise and 45-degree lines.
Source Stefan Aleksić
A dark one with geometric shapes and dotted lines.
Source Mohawk Studios