A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
From a drawing in 'Studies for Stories', Jean Ingelow, 1864.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Cubes as far as your eyes can see. You know, because they tile.
Source Jan Meeus
From a drawing in 'From Snowdon to the Sea. Striking stories of North and South Wales', Marie Trevelyan, 1895.
Source Firkin
Free tiled background with colorful stripes and white splatter.
Source V. Hartikainen
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Plywood Web Background background image for use in web design.
Source V. Hartikainen
The image a seamless pattern derived from a weed which I can't identify.The original weed image is from here:https://jp.pinterest.com/pin/500744052301423641/
Source Yamachem
Prismatic Geometric Tessellation Pattern 3 No Background
Source GDJ
It has waves, so make sure you don’t get sea sickness.
Source CoolPatterns
An interesting dark spotted pattern at an angle.
Source Hendrik Lammers
Remixed from a PNG that was uploaded to Pixabay by VictorianLady
Source Firkin
Like the name says, light and gray, with some small dots and circles.
Source Brenda Lay
Sharp pixel pattern, just like the good old days.
Source Paridhi
There are quite a few grid patterns, but this one is a super tiny grid with some dust for good measure.
Source Dominik Kiss
You can never get enough of these tiny pixel patterns with sharp lines.
Source Designova
Crossing lines with a subtle emboss effect on a dark background.
Source Stefan Aleksić
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
You guessed it – looks a bit like cloth.
Source Peax Webdesign
Light and tiny, just the way you like it.
Source Rohit Arun Rao
A grayscale fabric pattern with vertical lines of stitch holes.
Source V. Hartikainen