A light brushed aluminum pattern for your pleasure.
Source Tim Ward
Actually, there's no clouds in it, but I think it looks quite nice.
Source V. Hartikainen
Carbon fiber is never out of fashion, so here is one more style for you.
Source Alfred Lee
Has nothing to do with toast, but it’s nice and subtle.
Source Pippin Lee
Remixed from a raster on Pixabay, that was uploaded by ArtsyBee.
Source Firkin
Dark, square, clean and tidy. What more can you ask for?
Source Jaromír Kavan
A seamless pattern from a tile made from a jpg on Pixabay. To get the tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
CC0 remixed from a drawing. Walter Crane, 1914, Firkin.
Source SliverKnight
Could be paper, could be a Polaroid frame – up to you!
Source Chaos
If you’re sick of the fancy 3D, grunge and noisy patterns, take a look at this flat 2D brick wall.
Source Listvetra
Turn your site into a dragon with this great scale pattern.
Source Alex Parker
You know you can’t get enough of these linen-fabric-y patterns.
Source James Basoo
From drawing in 'Musings in Maoriland', Thomas Bracken, 1890.
Source Firkin
Prismatic Curved Diamond Pattern 5 No Background
Source GDJ
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
emixed from a JPG that was uploaded to Pixabay by Kyotime
Source Firkin
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
A seamless pattern of dark bricks. Maybe it's not very realistic, but it looks good in my opinion.
Source V. Hartikainen
Light gray paper pattern with small traces of fiber and some dust.
Source Atle Mo
Pattern #100! A black classic knit-looking pattern.
Source Factorio.us Collective
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
Small gradient crosses inside 45-degree boxes, or bigger crosses if you will.
Source Wassim
A colourful background drawn originally in paint.net and vectorised in Vector Magic.
Source Firkin
Zero CC tileable wood texture, made by me procedurally in Neo Texture Edit.
Source Sojan Janso
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
One can never have too few rice paper patterns, so here is one more.
Source Atle Mo
A seamless background texture of old cardboard.
Source V. Hartikainen
This background pattern contains a seamless texture of bark. It's not very realistic, but I think it looks quite nice.
Source V. Hartikainen