Looks like a technical drawing board: small squares forming a nice grid.
Source We Are Pixel8
This texture looks like old leather. It should look great as a background on web pages.
Source V. Hartikainen
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
A seamless pattern formed from a square tile based on a jpg on Pixabay. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I.
Source Firkin
Here's a camo print with more tan and less green, such as might be used in a desert scenario. This is tileable, so it can be used as a wallpaper or background.
Source Eady
From a drawing in 'A Life Interest', Mrs Alexander, 1888.
Source Firkin
Inspired by an image that was uploaded to Pixabay by geralt
Source Firkin
White circles connecting on a light gray background.
Source Mark Collins
From a drawing in 'Bond Slaves. The story of a struggle.', Isabella Varley, 1893.
Source Firkin
Paper pattern with small dust particles and 45-degree strokes.
Source Atle Mo
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
A cute x, if you need that sort of thing.
Source Juan Scrocchi
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
Don’t look at this one too long if you’re high on something.
Source Luuk van Baars
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Zero CC bark from fur tree tileable texture, photographed and made by me. CC0
Source Sojan Janso
Floral patterns might not be the hottest thing right now, but you never know when you need it!
Source Lauren
Dark, lines, noise, tactile. You get the drift.
Source Anatoli Nicolae
Abstract Ellipses Background Grayscale
Source GDJ
A free seamless background image with abstract texture of green "curtain".
Source V. Hartikainen
This background has abstract texture with some similarities to wood.
Source V. Hartikainen
Remixed from a JPG that was uploaded to Pixabay by theasad121
Source Firkin