From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Not a flat you live inside, like in the UK – but a flat piece of cardboard.
Source Appleshadow
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
This ons is quite old school looking. Retro, even. I like it.
Source Arno Declercq
Remixed from a drawing in 'A Child of the Age', Francis Adams, 1894.
Source Firkin
Number five from the same submitter, makes my job easy.
Source Dima Shiper
Derived from a JPG that was uploaded to Pixabay by ractapopulous
Source Firkin
I’m starting to think I have a concrete wall fetish.
Source Atle Mo
A light background pattern with diagonal stripes. Here's a simple light striped background for you.
Source V. Hartikainen
Original seamless pattern with an Inkscape filter.
Source Firkin
This background has abstract texture with some similarities to wood.
Source V. Hartikainen
A free background pattern with abstract green tiles.
Source V. Hartikainen
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Bit of a strange name on this one, but still nice. Tiny gray square things.
Source Carlos Valdez
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
Black And White Floral Pattern Background Inverse
Source GDJ
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
Not even 1kb, but very stylish. Gray thin lines.
Source Struck Axiom
Derived from a drawing in 'The Murmur of the Shells', Samuel Cowen, 1879.
Source Firkin
A repeating gloomy background image. This one consists of a pattern of black chains layered on top of a dark textured background.
Source V. Hartikainen
Never out of fashion and so much hotter than the 45º everyone knows, here is a sweet 60º line pattern.
Source Atle Mo
Can never have too many knitting patterns, especially as nice as this.
Source Victoria Spahn
One more sharp little tile for you. Subtle circles this time.
Source Blunia
A classic dark tile for a bit of vintage darkness.
Source Listvetra