Little x’es, noise and all the stuff you like. Dark like a Monday, with a hint of blue.
Source Tom McArdle
ZeroCC tileable stone texture, edited from pixabay. CC0
Source Sojan Janso
Same as the black version, but now in shades of gray. Very subtle and fine grained.
Source Atle Mo
Bright gray tones with a hint of some metal surface.
Source Hendrik Lammers
A bit strange this one, but nice at the same time.
Source Diogo Silva
You can never get enough of these tiny pixel patterns with sharp lines.
Source Designova
Here's a bluish gray striped background pattern for use on web sites.
Source V. Hartikainen
From an image on opengameart.org shared by rubberduck.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
The file was named striped lens, but hey – Translucent Fibres works too.
Source Angelica
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Cubes as far as your eyes can see. You know, because they tile.
Source Jan Meeus
You guessed it – looks a bit like cloth.
Source Peax Webdesign
From a drawing in 'Gately's World's Progress', Charles Beale, 1886.
Source Firkin
The first pattern on here using opacity. Try it on a site with a colored background, or even using mixed colors.
Source Nathan Spady
One more in the line of patterns inspired by Japanese/Asian styles. Smooth.
Source Kim Ruddock
Farmer could be some sort of fabric pattern, with a hint of green.
Source Fabian Schultz
A simple example on using clones. You can generate a nice base for a pattern fill quickly with it.
Source Lazur URH
Prismatic Groovy Concentric Background 2 No Black
Source GDJ
Remixed from a drawing in 'Works. Popular edition', John Ruskin, 1886.
Source Firkin
Don’t look at this one too long if you’re high on something.
Source Luuk van Baars