This one could be the shirt of a golf player. Angled lines in different thicknesses.
Source Olivier Pineda
Paper pattern with small dust particles and 45-degree strokes.
Source Atle Mo
Zero CC Mossy stone tileable texture, photographed and made by me. CC0
Source Sojan Janso
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
Looks like a technical drawing board: small squares forming a nice grid.
Source We Are Pixel8
Prismatic Groovy Concentric Background
Source GDJ
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
Don’t look at this one too long if you’re high on something.
Source Luuk van Baars
The following orange background pattern resembles a honeycomb.
Source V. Hartikainen
Prismatic Isometric Cube Wireframe Pattern No Background
Source GDJ
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
A light brushed aluminum pattern for your pleasure.
Source Tim Ward
One of the few full-color patterns here, but this one was just too good to pass up.
Source Alexey Usoltsev
Everyone needs some stardust. Sprinkle it on your next project.
Source Atle Mo
A nice one indeed, but I have a feeling we have it already? If you spot a copy, let me know on Twitter.
Source Graphiste
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
There are quite a few grid patterns, but this one is a super tiny grid with some dust for good measure.
Source Dominik Kiss
White handmade paper pattern with small bumps.
Source Marquis
This is a remix of "geometrical pattern 01".
Source Yamachem
Not the Rebel alliance, but a dark textured pattern.
Source Hendrik Lammers
People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A free seamless texture of reptile skin colored in a dark brown color. As always, you may use it as a repeated background image in your web design works, or for any other purposes.
Source V. Hartikainen
A seamless pattern formed from background pattern 102
Source Firkin
Prismatic Groovy Concentric Background 2 No Black
Source GDJ
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin