From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
The name alone is awesome, but so is this sweet dark pattern.
Source Federica Pelzel
A background pattern with green vertical stripes. A new striped background pattern. This time a green one.
Source V. Hartikainen
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy
Seamless Green Tile Background
Source V. Hartikainen
Prismatic Abstract Geometric Background 5
Source GDJ
A seamless pattern from a tile made from a jpg on Pixabay. To get the tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Prismatic Abstract Geometric Background 5 No Black
Source GDJ
A new one called white wall, not by me this time.
Source Yuji Honzawa
A nice one indeed, but I have a feeling we have it already? If you spot a copy, let me know on Twitter.
Source Graphiste
More Japanese-inspired patterns, Gold Scales this time.
Source Josh Green
Just like your old suit, all striped and smooth.
Source Alex Berkowitz
A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf
This background pattern contains a texture of yellow wood planks. I think it looks quite original.
Source V. Hartikainen
Basket Fibers, Basket Texture, Braid Background style CC0 texture.
Source 1A-Photoshop
Prismatic Polka Dots Mark II 3 No Background
Source GDJ
This one needs to be used in small areas; you can see it repeat.
Source Luca
Remixed from a raster on Pixabay, that was uploaded by ArtsyBee.
Source Firkin
Sweet and subtle white plaster with hints of noise and grunge.
Source Phil Maurer