This seamless pattern consists of a blue grid on a yellow background.
Source V. Hartikainen
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
A bit of scratched up grayness. Always good.
Source Dmitry
From a drawing in 'A Guide to the Guildhall of the City of London', John Baddeley, 1898.
Source Firkin
Remixed from a design on Pixabay. To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
With a name this awesome, how can I go wrong?
Source Nikolay Boltachev
White circles connecting on a light gray background.
Source Mark Collins
I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
From drawing in 'Musings in Maoriland', Thomas Bracken, 1890.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
The base gradient edited so now more details are rendered.
Source Lazur URH
Looks a bit like concrete with subtle specks spread around the pattern.
Source Mladjan Antic
Brushed aluminum, in a bright gray version. Lovely 2X as well.
Source Andre Schouten
An attempt for cleaning up the original image in a few steps.
Source Lazur URH
Retro Circles Background 4 No Black
Source GDJ
Dark pattern with some nice diagonal stitched lines crossing over.
Source Ashton
Prismatic Triangular Background Design Mark II 5
Source GDJ
Remixed from a drawing in 'Analecta Eboracensia', Thomas Widdrington, 1897.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso