If you don’t like cream and pixels, you’re in the wrong place.
Source Mizanur Rahman
A free seamless background with pink spots.
Source V. Hartikainen
Imagine you zoomed in 1000X on some fabric. But then it turned out to be a skeleton!
Source Angelica
Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
Used in small doses, this could be a nice subtle pattern. Used on a large surface, it’s dirty!
Source Paul Reulat
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Light gray paper pattern with small traces of fiber and some dust.
Source Atle Mo
Remixed from a JPG that was uploaded to Pixabay by theasad121
Source Firkin
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
From drawing in 'Musings in Maoriland', Thomas Bracken, 1890.
Source Firkin
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
Here I have tried to create something that would look like maple wood. Not sure how well it's turned out, but at least it looks like wood.
Source V. Hartikainen
A seamless marble-like texture colored in light blue.
Source V. Hartikainen