CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
A bit of scratched up grayness. Always good.
Source Dmitry
A background formed from an image of an old tile on the New York Metropolitan Museum of Art website. To get the base tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
This is the third pattern called Dark Denim, but hey, we all love them!
Source Brandon Jacoby
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Super dark, crisp and detailed. And a Kill Bill reference.
Source Badhon Ebrahim
A pattern derived from repeating unit cells each derived from part of a mosaic in paint.net. The starting point for the mosaic was a picture of some prawns!
Source Firkin
Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin
It’s like Shine Dotted’s sister, only rotated 45 degrees.
Source mediumidee
He influenced us all. “Don’t be sad because it’s over. Smile because it happened.”
Source Atle Mo
The basic shapes never get old. Simple triangle pattern.
Source Atle Mo
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
From a design in 'Storia del Palazzo Vecchio in Firenze', Aurelio Gotti, 1889.
Source Firkin
Fix and cc0 to get the tile this is based on.
Source SliverKnight
Subtle scratches on a light gray background.
Source Andrey Ovcharov
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Abstract Ellipses Background Grayscale
Source GDJ
Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy