A free seamless background texture of "timber wall" (colored in dark brown).
Source V. Hartikainen
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Looks a bit like concrete with subtle specks spread around the pattern.
Source Mladjan Antic
A seamless chequerboard pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i. Alternative colour scheme.
Source Firkin
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
It’s okay to be square! A nice light gray pattern with random squares.
Source Waseem Dahman
We have some linen patterns here, but none that are stressed. Until now.
Source Jordan Pittman
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A bit strange this one, but nice at the same time.
Source Diogo Silva
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
A seamless textured paper for backgrounds. Colored in pale orange hues.
Source V. Hartikainen
Could be paper, could be a Polaroid frame – up to you!
Source Chaos
Zero CC tileable cork floor, photographed and made by me. CC0
Source Sojan Janso
A topographic map like this has actually been requested a few times, so here you go!
Source Sam Feyaerts
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
A frame using leaves from an image that was uploaded to Pixabay by mayapujiati
Source Firkin
Geometric triangles seem to be quite hot these days.
Source Pixeden
One of the few full-color patterns here, but this one was just too good to pass up.
Source Alexey Usoltsev
A version without colours blended together to give a different look.
Source Firkin
A seamless texture of worn out "cardboard".
Source V. Hartikainen
Scanned some rice paper and tiled it up for you. Enjoy.
Source Atle Mo
From an image on opengameart.org shared by rubberduck.
Source Firkin
A repeating graphic with ancient pattern. I came up with this name/title at last minute, so you may find that there is very little of ancientness in this pattern after all.
Source V. Hartikainen
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
A seamless pattern formed from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin