Cubes as far as your eyes can see. You know, because they tile.
Source Jan Meeus
A huge one at 800x600px. Made from a photo I took going home after work.
Source Atle Mo
A free black metallic background pattern. Here's a new pattern I made that looks metallic.
Source V. Hartikainen
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin
Classy golf-pants pattern, or crossed stripes if you will.
Source Will Monson
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Abstract Geometric Monochrome Pattern Prismatic No Background
Source GDJ
Prismatic Groovy Concentric Background 5
Source GDJ
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
A background pattern with wavy green vertical stripes. This one has green stripes on a white background. Download if you like it.
Source V. Hartikainen
No idea what Nistri means, but it’s a crisp little pattern nonetheless.
Source Markus Reiter
Prismatic Polka Dots Mark II 3 No Background
Source GDJ
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I.
Source Firkin
Just what the name says, paper fibers. Always good to have.
Source Heliodor jalba
Inspired by a drawing in 'Kulturgeschichte', Freidrich Hellwald, 1896.
Source Firkin
Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy
Tiny, tiny 3D cubes. Reminds me of the good old pattern from k10k.
Source Etienne Rallion
The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.
Source Firkin