A heavy dark gray base, some subtle noise and a 45-degree grid makes this look like a pattern with a tactile feel to it.
Source Atle Mo
Looks like a technical drawing board: small squares forming a nice grid.
Source We Are Pixel8
It almost looks a bit blurry, but then again, so are fishes.
Source Petr Šulc
This was formed by distorting an image of a background on Pixabay.
Source Firkin
A beautiful dark wood pattern, superbly tiled.
Source Omar Alvarado
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
This ladies and gentlemen, is texturetastic! Love it.
Source Adam Pickering
Stefan is hard at work, this time with a funky pattern of squares.
Source Stefan Aleksić
Not a flat you live inside, like in the UK – but a flat piece of cardboard.
Source Appleshadow
Black And White Floral Pattern Background from PDP.
Source GDJ
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
A very dark spotted twinkle pattern for your twinkle needs.
Source Badhon Ebrahim
From a drawing in 'The Quiver of Love', Walter Crane, 1876
Source Firkin
Original minus the background
Source Firkin
A seamless pattern formed from miutopia mug remixes on a tablecloth.
Source Firkin
More in the paper realm, this time with fibers.
Source Jorge Fuentes
And some more testing, this time with Seamless Studio. It’s Robots FFS!
Source Seamless Studio
Remixed from a drawing in 'Paul's Sister', Frances Peard, 1889.
Source Firkin
A seamless pattern recreated from an image on Pixabay. It is reminiscent of parquet flooring and is formed from a square tile, which can be recovered in Inkscape by selecting the ungrouped rectangle and using shift-alt-I together.
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Your eyes can trip a bit from looking at this – use it wisely.
Source Michal Chovanec
Geometric triangles seem to be quite hot these days.
Source Pixeden
A mid-tone gray pattern with some cement looking texture.
Source Hendrik Lammers
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Black version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin