Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin
An abstract texture of black metal pipes (seamless).
Source V. Hartikainen
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
This background pattern has futuristic look. So, maybe it could be used on websites or blogs dedicated to video games?!
Source V. Hartikainen
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Prismatic Abstract Geometric Background 5 No Black
Source GDJ
Hey, you never know when you’ll need a bird pattern, right?
Source Pete Fecteau
The classic subtle pattern. Sort of wall/brick looking. Or moon-looking?
Source Joel Klein
Mostly just mucked about with the colours and made one of the paths in the lead frame opaque. The glass remains transparent.
Source Firkin
Derived from a drawing in 'The Murmur of the Shells', Samuel Cowen, 1879.
Source Firkin
Can never have too many knitting patterns, especially as nice as this.
Source Victoria Spahn
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
You know I love paper patterns. Here is one from Stephen. Say thank you!
Source Stephen Gilbert
Background Wall, Art Abstract, white Well & CC0 texture.
Source Ractapopulous
A seamless pattern with a unit cell drawn as a bitmap in Paint.net and vectorized in Vector Magic.
Source Firkin
Sharp diamond pattern. A small 24x18px tile.
Source Tom Neal
From a drawing in 'Gately's World's Progress', Charles Beale, 1886.
Source Firkin
The name is totally random, but hey, it sounds good.
Source Atle Mo
Prismatic Abstract Line Art Pattern Background
Source GDJ
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso