People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
Seamless Dark Grunge Texture. Here's a new grunge texture for use as a background.
Source V. Hartikainen
Dark pattern with some nice diagonal stitched lines crossing over.
Source Ashton
A seamless pattern based on a square tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
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
An alternative colour scheme to the original seamless pattern.
Source Firkin
A smooth mid-tone gray, or low contrast if you will, linen pattern.
Source Jordan Pittman
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
No idea what Nistri means, but it’s a crisp little pattern nonetheless.
Source Markus Reiter
Zero CC tileable wood texture, made by me procedurally in Neo Texture Edit.
Source Sojan Janso
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
Abstract Tiled Background Extended 10
Source GDJ
Don’t look at this one too long if you’re high on something.
Source Luuk van Baars
You know you love wood patterns, so here’s one more.
Source Richard Tabor
Prismatic Abstract Line Art Pattern Background
Source GDJ
An aged paper background tile with smeared and pressed text.
Source V. Hartikainen
Tiny, tiny 3D cubes. Reminds me of the good old pattern from k10k.
Source Etienne Rallion
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
Colored maple leaves scattered on a surface. This is tileable, so it can be used as a background or wallpaper.
Source Eady
Prismatic Groovy Concentric Background 4 No Black
Source GDJ
This makes me wanna shoot some pool! Sweet green pool table pattern.
Source Caveman
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Medium gray fabric pattern with 45-degree lines going across.
Source Atle Mo
Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin