Colour version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
Prismatic Groovy Concentric Background 5 No Black
Source GDJ
A seamless chequerboard pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i. Alternative colour scheme.
Source Firkin
A slightly more textured pattern, medium gray. A bit like a potato sack?
Source Bilal Ketab
And some more testing, this time with Seamless Studio. It’s Robots FFS!
Source Seamless Studio
Hexagonal dark 3D pattern. What more can you ask for?
Source Norbert Levajsics
Tweed is back in style – you heard it here first. Also, the @2X version here is great!
Source Simon Leo
Zero CC tileable moss or lichen covered stone texture, edited from pixabay. CC0
Source Sojan Janso
Super detailed 16×16 tile that forms a beautiful pattern of straws.
Source Pavel
8 by 8 pixels, and just what the title says.
Source pixilated
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Washi (和紙?) is a type of paper made in Japan. Here’s the pattern for you!
Source Carolynne
Bit of a strange name on this one, but still nice. Tiny gray square things.
Source Carlos Valdez
Basket Fibers, Basket Texture, Braid Background style CC0 texture.
Source 1A-Photoshop
Same as the black version, but now in shades of gray. Very subtle and fine grained.
Source Atle Mo
Abstract Ellipses Background Grayscale
Source GDJ
Seamless Light Background Texture.
Source V. Hartikainen
This is the remix of "Strawberry Pattern Background" uploaded by "GDJ". Thanks. I realigned strawberries so as to get seamless and changed the BG color.
Source Yamachem
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin