Greyscale version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
It was called Navy Blue, but I made it dark. You know, the way I like it.
Source Ethan Hamilton
Abstract Tiled Background Extended 6
Source GDJ
Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
The file was named striped lens, but hey – Translucent Fibres works too.
Source Angelica
Tile available in Inkscape using shift-alt-i on the selected rectangle
Source Firkin
Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
Coming in at 666x666px, this is an evil big pattern, but nice and soft at the same time.
Source Atle Mo
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
From a design found in 'History of the Virginia Company of London; with letters to and from the first Colony, never before printed', Edward Neill, 1869.
Source Firkin
Medium gray pattern with small strokes to give a weave effect.
Source Catherine
From a drawing in 'Studies for Stories', Jean Ingelow, 1864.
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
ZeroCC tileable stone texture, edited from pixabay, CC0
Source Sojan Janso
Prismatic Groovy Concentric Background 4
Source GDJ
A bit of scratched up grayness. Always good.
Source Dmitry
A free repetitive background with a dark concrete wall like texture. This one may be used in dark web site designs.
Source V. Hartikainen
A very slick dark rubber grip pattern, sort of like the grip on a camera.
Source Sinisha
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ
A light brushed aluminum pattern for your pleasure.
Source Tim Ward
Here's a seamless brown cork board background texture. Feel free to download or reshare if you like.
Source V. Hartikainen
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
A seamless pattern drawn originally in Paint.net by distorting a slice of background pattern 116 and copying the resulting triangle numerous times.
Source Firkin
A very dark spotted twinkle pattern for your twinkle needs.
Source Badhon Ebrahim