Number five from the same submitter, makes my job easy.
Source Dima Shiper
Simple combination of stripy squares with their negatively coloured counterparts
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
An alternative colour scheme for the original seamless texture formed from an image on Pixabay.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Bit of a strange name on this one, but still nice. Tiny gray square things.
Source Carlos Valdez
This is the remix of an Openclipart clipart called "Maze" uploaded by "any_ono_mous".Thanks.This is a seamless pattern of a maze.
Source Yamachem
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
A background formed from an image of an old tile on the New York Metropolitan Museum of Art website. To get the base tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
You know I love paper patterns. Here is one from Stephen. Say thank you!
Source Stephen Gilbert
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
This background pattern contains worn out colorful stripes as a texture.
Source V. Hartikainen
A set of paper filters. The base texture is generated the same way, only the compositing mode is varied.
Source Lazur URH
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
A smooth mid-tone gray, or low contrast if you will, linen pattern.
Source Jordan Pittman
Looks like a technical drawing board: small squares forming a nice grid.
Source We Are Pixel8
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
Can never have too many knitting patterns, especially as nice as this.
Source Victoria Spahn
Abstract Arbitrary Geometric Background derived from an image on Pixabay.
Source GDJ
We have some linen patterns here, but none that are stressed. Until now.
Source Jordan Pittman