CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
The Grid. A digital frontier. I tried to picture clusters of information as they traveled through the computer.
Source Haris Šumić
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
The classic notebook paper with horizontal stripes.
Source Are Sundnes
A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
There are many carbon patterns, but this one is tiny.
Source Designova
Feel free to use this seamless background texture as a background on a web site. It's colored in a light pink color and is seamlessly tile-able.
Source V. Hartikainen
An attempt for cleaning up the original image in a few steps.
Source Lazur URH
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Prismatic Abstract Geometric Background 5
Source GDJ
Awesome name, great pattern. Who does not love space?
Source Nick Batchelor
People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
Not even 1kb, but very stylish. Gray thin lines.
Source Struck Axiom
More leather, and this time it’s bigger! You know, in case you need that.
Source Elemis
If you like it a bit trippy, this wave pattern might be for you.
Source Ian Soper
A seamless pattern that includes the original tile (go to Objects / Pattern / Pattern To Objects in Inkscape's menu to extract it).
Source GDJ
Snap! It’s a pattern, and it’s not grayscale! Of course you can always change the color in Photoshop.
Source Atle Mo
Stefan is hard at work, this time with a funky pattern of squares.
Source Stefan Aleksić
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
The name is totally random, but hey, it sounds good.
Source Atle Mo
Prismatic Curved Diamond Pattern 6 No Background
Source GDJ
Zero CC tileable hard cover cells, skin like, book texture. 4K, Scanned and made by me CC0
Source Sojan Janso