Heavy depth and shadows here, but might work well on some mobile apps.
Source Damian Rivas
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
Imagine you zoomed in 1000X on some fabric. But then it turned out to be a skeleton!
Source Angelica
An alternative colour scheme to the original seamless pattern.
Source Firkin
This background has abstract texture with some similarities to wood.
Source V. Hartikainen
An orange vertically striped background pattern. Feel free to download and use this orange background pattern, for example, on the web). It resembles a wallpaper with vertical stripes or something similar to it.
Source V. Hartikainen
Adapted from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
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
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Prismatic Groovy Concentric Background 2 No Black
Source GDJ
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Simple combination of stripy squares with their negatively coloured counterparts
Source Firkin
Got some felt in my mailbox today, so I scanned it for you to use.
Source Atle Mo
This one is rather fun and playful. The 2X could be used at 1X too!
Source Welsley
Looks like a technical drawing board: small squares forming a nice grid.
Source We Are Pixel8
A version without colours blended together to give a different look.
Source Firkin
A free black metallic background pattern. Here's a new pattern I made that looks metallic.
Source V. Hartikainen
A tile-able background for websites with paper-like texture and a grid pattern layered on top of it.
Source V. Hartikainen
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
A brown metallic grid pattern layered on top of a dark fabric texture. It should look great when using as a tiled background on web pages, especially blogs.
Source V. Hartikainen
A grayscale fabric pattern with vertical lines of stitch holes.
Source V. Hartikainen
This one needs to be used in small areas; you can see it repeat.
Source Luca
From a drawing in 'Gately's World's Progress', Charles Beale, 1886.
Source Firkin
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
That’s what it is, a dark dot. Or sort of carbon looking.
Source Tsvetelin Nikolov
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