Farmer could be some sort of fabric pattern, with a hint of green.
Source Fabian Schultz
Some dark 45 degree angles creating a nice pattern. Huge.
Source Dark Sharp Edges
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Prismatic Curved Diamond Pattern No Background
Source GDJ
A seamless pattern formed from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A simple example on using clones. You can generate a nice base for a pattern fill quickly with it.
Source Lazur URH
No, not the band but the pattern. Simple squares in gray tones, of course.
Source Atle Mo
Bumps, highlight and shadows – all good things.
Source Badhon Ebrahim
Inspired by a pattern seen on a public domain image of a very old tile. To get the unit cell, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
An alternative colour scheme to the original seamless pattern.
Source Firkin
Inspired by a pattern I saw in a 19th century book. This seamless pattern was created from a square tile. To get the tile, select the pattern in Inkscape and use shift+alt+i.
Source Firkin
Nothing like a clean set of bed sheets, huh?
Source Badhon Ebrahim
Alternative colour scheme. Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A seamless background of warped stripes on paper.
Source V. Hartikainen
Green Web Background, Seamless tile.
Source V. Hartikainen
From a drawing in 'An Old Maid's Love. A Dutch tale told in English', Maarten Maartens, 1891.
Source Firkin
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A seamless pattern based on a square tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
Remixed from a drawing in 'The Canadian horticulturist', 1892
Source Firkin
Prismatic Groovy Concentric Background 3 No Black
Source GDJ
Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa
Paper model of a tetrahedron. Modelo de papel de um tetraedro.
Source laobc
You may use it as is, or modify it as you like.
Source V. Hartikainen
A light gray wall or floor (you decide) of concrete.
Source Atle Mo
A bit like some carbon, or knitted netting if you will.
Source Anna Litvinuk