This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
Fabric-ish patterns are close to my heart. French Stucco to the rescue.
Source Christopher Buecheler
White circles connecting on a light gray background.
Source Mark Collins
The starting point for this was drawn on the web site steamcoded.org/PolyskelionMaker.svg
Source Firkin
A floral background formed from numerous clones of flower 117.
Source Firkin
Prismatic Groovy Concentric Background 2 No Black
Source GDJ
Seamless pattern the basic tile for which can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Prismatic Curved Diamond Pattern 2 No Background
Source GDJ
Lovely pattern with some good-looking non-random noise lines.
Source Zucx
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
From a drawing in 'Bond Slaves. The story of a struggle.', Isabella Varley, 1893.
Source Firkin
Nicely crafted paper pattern, although a bit on the large side (500x593px).
Source Blaq Annabiosis
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
Same classic 45-degree pattern, dark version.
Source Luke McDonald
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
After 1 comes 2, same but different. You get the idea.
Source Hendrik Lammers
A version without colours blended together to give a different look.
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
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Sharp pixel pattern looking like some sort of fabric.
Source Dmitry
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin