Remixed from a raster on Pixabay, that was uploaded by ArtsyBee.
Source Firkin
The name alone is awesome, but so is this sweet dark pattern.
Source Federica Pelzel
A new take on the black linen pattern. Softer this time.
Source Atle Mo
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Prismatic Groovy Concentric Background 4
Source GDJ
This one is something special. I’d call it a flat pattern, too. Very well done, sir!
Source GetDiscount
Pass parameters to the URL or edit the source code variables to configure the graph paper for the division desired.
Source JayNick
Looks a bit like concrete with subtle specks spread around the pattern.
Source Mladjan Antic
A free tileable background colored in off-white (antique white) color.
Source V. Hartikainen
Light square grid pattern, great for a “DIY projects” sort of website, maybe?
Source Rafael Almeida
A free pink background pattern.
Source V. Hartikainen
Derived from an image that was uploaded to Pixabay by Darkmoon1968
Source Firkin
From a drawing in 'From Snowdon to the Sea. Striking stories of North and South Wales', Marie Trevelyan, 1895.
Source Firkin
Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
A new one called white wall, not by me this time.
Source Yuji Honzawa
A background pattern with blue on white vertical stripes.
Source V. Hartikainen
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin
Super dark, crisp and detailed. And a Kill Bill reference.
Source Badhon Ebrahim
Not strictly seamless in that opposite edges are not identical. But they do marry up to make an interesting pattern
Source Firkin