People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
Pass parameters to the URL or edit the source code variables to configure the graph paper for the division desired.
Source JayNick
Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
Zero CC tileable pine bark texture, photographed and made by me. CC0
Source Sojan Janso
This was submitted in a beige color, hence the name. Now it’s a gray paper pattern.
Source Konstantin Ivanov
Coming in at 666x666px, this is an evil big pattern, but nice and soft at the same time.
Source Atle Mo
A dark brown fabric-like background texture with seamless pattern of winding stripes.
Source V. Hartikainen
An alternative colour scheme to the original seamless pattern.
Source Firkin
You know I’m a sucker for these. Well-crafted paper pattern.
Source Mihaela Hinayon
Remixed from a drawing in 'Очерки Русской Исторіи въ памятникахъ быта', Petr Polevoi, 1879.
Source Firkin
Little x’es, noise and all the stuff you like. Dark like a Monday, with a hint of blue.
Source Tom McArdle
The starting point for this was drawn on the web site steamcoded.org/PolyskelionMaker.svg
Source Firkin
All good things come in threes, so I give you the third in my little concrete wall series.
Source Atle Mo
Got some felt in my mailbox today, so I scanned it for you to use.
Source Atle Mo
Alternative colour scheme. Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A background pattern with wavy green vertical stripes. This one has green stripes on a white background. Download if you like it.
Source V. Hartikainen
Seamless Green Tile Background
Source V. Hartikainen
Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
Remixed from a design seen on Pixabay. The basic tile can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin