It has waves, so make sure you don’t get sea sickness.
Source CoolPatterns
Prismatic Curved Diamond Pattern 2 No Background
Source GDJ
It looks like a polished stone surface to me. Download it for free, as always.
Source V. Hartikainen
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Derived from a corner decoration itself found as a jpg on Pixabay.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
A white version of the very popular linen pattern.
Source Ant Ekşiler
A comeback for you: the popular Escheresque, now in black.
Source Patten
This is a grid, only it’s noisy. You know. Reminds you of those printed grids you draw on.
Source Vectorpile
I’m guessing this is related to the Sony Vaio? It’s a nice pattern no matter where it’s from.
Source Zigzain
Remixed from a raster on Pixabay that was uploaded by ArtsyBee.
Source Firkin
And some more testing, this time with Seamless Studio. It’s Robots FFS!
Source Seamless Studio
Sharp pixel pattern looking like some sort of fabric.
Source Dmitry
The perfect pattern for all your blogs about type, or type-related matters.
Source Atle Mo
Prismatic Geometric Pattern Background No Black
Source GDJ
Dark Tile-able Grunge Texture. I think this texture can be classified as grunge. It's free and seamless, as always.
Source V. Hartikainen
Prismatic Abstract Geometric Background derived from an image on Pixabay.
Source GDJ
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin